Pros: - Better clean than expected - Fits under lip of standard cabinets and our stove - Pretty quiet - Very easy to use - App working well so far Cons: - Can't get over large lips like for different flooring. - Doesn't spray near cabinets/walls I purchased this robot knowing it couldn't deep clean my floors. That didn't stop me from finding out exactly what it is capable of as soon as I opened it. We are a couple in our 30s who are pretty actively going out to the garden and back in. We are not particularly delicate with food and drink. We haven't mopped in a month. All the floors are disgusting. Or were, I should say. We also have a cat. First I ran our Neato vacuum cleaner to pick up large debris. Then I attached the dry sweep pad and set it loose on our hardwood floors. Turns out the robot can't handle large lifts like between the laminate in our kitchen and hardwood in the rest of the house. So first it was the living and dining. I was shocked at the amount of dirt the dry sweep run picked up even after I had just vaccuumed! And cat hair omg. Then I ran the wet mop and was impressed by how nice the floors looked after. Today was the real test: the kitchen. Very gross floors. Again, dry sweep first, picked up an enormous amount of dirt on that alone. Then we ran the wet mop and I have to admit, I'm impressed. It of course could not get every stuck on piece of food, but it got much more than I expected, including some gross unidentified gunk near our trash can. In fact, I would say the only gunk it was not capable of removing was some truly stuck to the ground food particles. Everything else, spills, sticky stuff, all gone. The floor does not feel as though there is any residue (used the trial of Braava cleaner). The only real negative is that while it does get under the cabinet edges, it seems to be programmed not to spray there, I assume to keep splatters off the cabinets, walls and appliances. Thus those areas don't get as clean. In the future I'll need to spritz some warm water under the cabinet edges to make sure it gets there. Overall I'm very pleased with my purchase, and think that if we run this every couple of days everyone will assume we work really hard to keep the floors this clean.

We have had a Brava for almost 6 months now. I had read the reviews about smeared floors and also how it won't go over thresholds. Which made me hesitant to purchase at first. I am fairly happy with this device. We have a iRobot 7 with the Automatic Dirt Disposal and love it so I thought we should try it. Now the first thing is you need to make sure you get your house mapped. You don't seem to be able to map well with mopping, not sure why. So put in a dry sweep pad and run mapping runs. You need to run 3 mapping runs to get your whole house mapped. Then you must label all the rooms (more on this later). Note that after each run I dusted off the pad and it picked up a lot of puppy hair (but we have a dog so that was somewhat expected). Now the reason people complain about the smeared floors is pretty simple. Imagine you were going to mop your house. You get the bucket out, dip the mop in it once and then go mop the house. You never come back and rinse the mop, you just occasionally spray a bit of water on the mop to keep it mopping.. By the time you had gotten very far you would be smearing dirt around too. This is the problem with the Brava mop, it has no way to clean its pad (unlike the vacuum with its base). This is why its really important when you make your maps out to name a *lot* of small area rooms. This way you can mop a particular small area. Let it complete then go take its pad off and clean it and put it back. This will make it so you don't get the smears folks in other reviews talk about. What the iRobot folks need to do is come up with some sort of base the robot can run back onto and have its pad cleaned somehow. I am not sure how that would work, but if they had that then this thing could clean your whole house in one go. Now instead I usually have it mop the kitchen (not our whole kitchen but a small area of it) at about 2pm. Then about 4pm I clean the pads and mop the other 1/2. Usually it uses 1/2 a tank of water on each area. And even at that if tit is especially dirty you will get smears. Once you get the house pretty clean then it can keep up... The key here is small areas.. think moping the whole house without rinsing the mop... You want each room to be what you would mop before you rinse. As to the thresholds, that is to keep it from going up on rugs and such. There is some options in the advanced features where you can mark areas that it can hop over, I have never had to do that since we live in Florida on tile that is real flat.. but I would hope that works :) Overall I like it but I will buy the next version that has a pad cleaning option for sure!!

I am deeply dissatisfied with this product. I wish I hadn't bought it, and I wish I'd listened to the other 1-star reviews, because they were right. This product is supposed to be an automated mopper, but it is neither automatic or a mopper. It's a $400 paper towel holder. Automation: This robot is not automated. It appears to have no object detection at all, running into any and all objects at full speed, often knocking them over onto the robot and causing it to get stuck. It is horrible at mapping, often missing rooms or adding "ghost" rooms that aren't real. It performs noticeably worse at night. It cannot cross any object higher than 3mm, so even small rugs or transition pieces between rooms are too much for it. Its ledge detection is faulty, causing it to randomly stop in the middle of the room and sit there until the battery dies, because it thinks its on stairs even when its on flat ground in the middle of the room. It won't even give a notification that it's in danger, the app reports that it's working properly. It cannot detect when its pads are dirty, so it will continue using a dirty pad. Its water tank is small, and it will stop when the tank isn't even empty, sometimes in the middle of a run. All of this means I can't trust it by itself, so it's not automatic. It almost never completes a full run by itself. It will get stuck, confused, dirty, empty, or dead, and I will need to help it. Mopping: This product uses either disposable or washable pads. The disposable pads are insanely overpriced, so reusable pads are the way to go. But it can't detect when the pad is dirty, so you have to check it after every run or it'll just use a dirty pad. The product works by rolling forward to check for objects, rolling backward, spraying water, and rolling forward again using the pad. It does not scrub at all, so anything even slightly sticky won't be cleaned, and even a clean floor is left wet or streaky. It also takes FOREVER to clean, because it effectively has to roll over the whole floor twice. And because it can't traverse anything taller than 3mm, it simply won't get to certain parts of the apartment. This is not mopping. This is lightly wetting the floor and halfway drying it. I'm not joking when I say that I could clean better using my hands and a damp paper towel. I have a Roomba i3 vacuum. I like that product. It maps well, it runs where it's supposed to, it vacuums well, it doesn't get stuck, and it works at night. I can set it up and know that it'll do it's job. That robot costs $300. This robot costs $400 plus the reusable pads, and it does not function. If this is supposed to be an automated mopper, it's a babysat paper towel holder. It is not fit for purpose. Releasing this robot in this state is bad, but charging $400 for it is unbelievable. I read the prior 1-star reviews and didn't read them. Maybe it was user error. Maybe it was old firmware that got better over the years. Maybe it was an old model. I should have listened. This robot sucks, and I regret buying it.

We got a Roomba i7+ a few months ago, and absolutely love it. The week we got it, we did two or three mapping runs, which took a couple of hours each, and it was ready to go. It mapped my entire apartment, I set up the rooms and no-go areas on the map, and that was it, I could easily tell the Roomba to clean specific rooms or specific areas of the apartment and it works great. It's cut down the amount of time cleaning significantly. So when I read about the Braava, how it uses the same app and the same Imprint mapping technology, and how it can team up with the Roomba to first vacuum and then mop the floor, I was sold. Unfortunately, it hasn't panned out the way I hoped; I've had this thing for almost a week and I have yet to successfully mop the floor, largely because I can't seem to get it to map my apartment. First of all, it's a little baffling that although they share the same app and the same network and the same technology, the Roomba and the Braava cannot share the same map the Roomba already generated; Braava needs to do its own mapping runs. Maybe the Braava gathers different data, or something. In any case, I didn't think too much about it because doing the mapping runs on the Roomba didn't take that long. However, I've been doing this for days and I can't get the Braava to generate a map of my apartment. In fact, I can't seem to get it to complete a mapping run at all. My Roomba takes about 3 hours to do a full cleaning of my apartment (including a battery charge in the middle of the run), or about 1.5 hours if I set it to do a training run. Meanwhile, Braava's non-cleaning training runs seem to take hours and hours. The first time I did one, it took over three hours, and I'm not sure it completed. Yesterday, it took 4 hours and 20 minutes to do a training run, with me monitoring it, and it immediately aborted it after it got stuck in the bathroom without giving me a notification or a chance to free it (as an aside, it's also significantly more prone to getting stuck in places than the Roomba; its bumpers seem a lot less sensitive, so it tends to get wedged in places or push doors closed, while the Roomba would simply back off as soon as it makes contact with something). A subsequent attempt at a training run ended instantly, and appears in the app as a successful, zero second mapping run. At this point I'm wasting hours of my day following this thing around my apartment hoping that at some point I'll be able to have a full map so I can tell it where it can and cannot go. I'm going to give it one more shot today, and if I still don't have a map, it's going back for a return. UPDATE: As a last-ditch effort before giving up and returning it, I did a full factory reset, started over from scratch, and that seemed to fix my issues. After I did this, I did a mapping run and right off the bat it seemed to navigate my apartment much, much better. After a couple mapping runs (which took around 2 hours each), I finally managed to have a complete map I could customize. I'm leaving the rest of the review, in case someone else runs into the same issue. With that issue out of the way, the robot actually does a pretty good job of mopping the floor. I was a little skeptical that it would be able to clean some dried stains I had in my kitchen, but it actually left it spotless. I particularly like that, like with my Roomba, I can set up clean zones and no-go zones in the map. For example, I have it set up to avoid the cat food bowls, and I have a clean zone under my stationary bike. It's pretty nifty that I can easily tell it to clean the floor under and around the bike after a workout. I also like that it can work with the Roomba, so that it mops the floor after the Roomba vacuums it, although not as efficiently as I hoped: the Roomba must finish the entire vacuuming job before the Braava even starts. I was hoping that once the Roomba moved to the next room, the Braava would mop the first one. This makes sense because they don't share maps, but in effect it makes the full cleaning job take twice as long. Overall, here are my impressions: Pros: - Does a pretty good job of cleaning floors, better than I expected. It does multiple overlapping passes, and then cleans the perimeter, so it doesn't seem to miss any spots. - Very, very quiet. It's nice to be able to do some cleaning while I'm working. - Long battery life. My Roomba usually needs a recharge mid-cleaning. Since the Braava doesn't have a vacuum, it lasts a lot longer. - Can work together the Roomba to vacuum and mop floors. - The wet mop it comes with is reusable and machine-washable. Cons: - It seems slightly worse than the Roomba at navigating; it's gotten lost in my small apartment a couple times, and was unable to find the home base. Hopefully it'll get better as it learns and improves the map. - As mentioned above, the bumpers seem less sensitive than the Roomba's, so it has a tendency to get wedged under my desk chair, or push doors closed, which the Roomba doesn't do. - It has a hard time docking sometimes. The base is very light and not very grippy, so it slides around when it's trying to dock. Sometimes I end up just doing it myself, it's a little maddening to see it try in vain over and over. - While I'm glad it ships with multiple mops (a reusable wet mop, and a couple disposable dry and wet mops), I'm a little disappointed it ships with a tiny bottle of cleaning fluid. It didn't last a week.

I finally bought the M6 after years of running the Roomba vacuums. We have all luxury vinyl plank flooring in the house and 6 dogs. They go in and out all day and bring in a bunch of dirt. Plus I have a goldendoodle that drips water everywhere each time she drinks. My floors look like a mess even though they are cleaned of dirt several times a day. The Brava M6 is incredible! It cleans up after the Roombas and leaves the floors streak free. I added it to my Roomba app and like another reviewer had mentioned, mine did a mapping run and it ran for 7 hours before I finally stopped it and did a factory reset on it. Then I waited until the next morning to try again, it then allowed me to import my maps from my Roomba J7 and was ready to go. Very easy and cool. I don't know why it didn't do that the first time but it started working after that. Immediately, the floors felt cleaner and looked great, just on the mapping run. But I was able to schedule the M6 to follow after the J7 and mop up. So far it's working well. I wish it had a light on it like the J7 so it could clean at night, but I have smart lights and schedule them to come on throughout the night in different rooms to allow the M6 to clean. The M6 is VERY quiet. It can easily run at night if you have the lighting for it. I run the J7 at night and it isn't as quiet. Plus the emptying process is pretty loud. We've gotten used to it, but it isn't stealth. The M6 is. I had thought a few times it had finished and gone back to the base because I couldn't hardly hear it. This does clean in a zigzag pattern but it also goes forward and backwards all through the process. It's a little frustrating to watch and it runs slower than the vacuums for sure, but it is doing a great job. Like all Roomba's, it can't be scheduled for jobs less than 3 hour apart. It's frustrating because I sometimes have it do areas that are very small and take less than 10 minutes. But scheduling through the app can't be done less than the 3 hours regardless. So I have my Roombas run every 3 hours starting at 11:30 at night and throughout the night. I have the vacuum clean up around the doors after breakfast with the dogs going out and drinking water. I now have the M6 come clean up the water and any other dirt right after all that. It's amazing how much cleaner everything feels. I bought some additional cleaning pads and cleaner. The cleaning solution they sent with it worked great so I ordered a lot more. The cheap pads I bought seem to do fine as well. I was so impressed how little water it uses, yet the floors look soaked. I'm running it on the medium water setting. There is about 2500Sq feet of flooring it is doing right now. It seems like it is plenty to do it all but I do refill it throughout the day to be sure. So far I'm impressed with the M6 like I have been with the vacuums. It keeps my house much cleaner and is simple to use. It works great with the existing Roombas and is easy to operate.

I don't usually write product reviews because my situation can vary greatly from others, but I did want to say a bit about the Braava Jet M6. I am on my second Roomba now (i7 and then J9+) and have been thoroughly impressed with those, so the Braava Jet had been tempting me. After reading countless reviews and firsthand feedback, I decided to buy one. I have not been disappointed. I believe that the benefit of this is dependent on what you expect and how you use it. Do I think that it would mop up a big blob of grape jelly? No. Would it mop up muddy boot prints? Probably not well. But even a bucket of water and a standard mop would require a bit of effort to clean those messes. Where the Braava Jet excels is in keeping a mostly clean floor spotless. I hand mopped my floors first, then ran the Braava Jet. Small spots on the floor such as a bit of grease spatter or minor splashing of common food ingredients are pretty easy for it. If you start with a clean floor and then run this often, it will keep your floors very clean. Go long periods of time between runs and on especially dirty floors and it may struggle. I like to see the sunshine through my windows reflecting off of clean floors - you know those reflections that highlight small patches of unidentifiable messes that somehow just appear? Well, Braava Jet will eliminate those. It's also important that your smart floor map has uneven surfaces marked with the threshold function. I've seen folks complain that it gets stuck moving from one type of hard surface to another. This is just the anti-carpet-mopping feature being too sensitive. Designate those hard floor transitions in the smart map and it won't have any troubles.

I bought the Braava m6 with the Roomba i7 bundle. I bought it because I have a dog who likes to walk across my floors nearly every day with dirty paws. I hate dirty floors, so I thought the Braava would save me time and my sanity by helping me keep the floors clean. For the most part, it certainly has done it's job. The robot is generally really great at methodically cleaning the floor. It does a simple back and forth pattern, so misses are rare. It easily takes care of dirty pawprints, slobber marks, simple kitchen spills, and water marks were my dog dribbled water across the floor. I haven't really had any sticky messes to test it on, but apparently if it finds those it spends more time cleaning that spot. I found getting the Braava mop to map my house was more difficult than it was to have the i7 vacuum map my house, mostly because of the transitions. My main floor is all hard floors with a few area rugs, but there are transitions between rooms. The carpet ride up feature of the mop made the robot think transitions were carpets, so it wouldn't go over them. So, it's kind of a chore to wait until the mop is close to the transition (about two feet or less, otherwise the robot will make an entirely new map not connected to your main one), pick it up, and carry it over the transition into the new room. I was successfully able to map other rooms that way, but I had to be home and able to watch the mop. Then, once the mop has mapped the new room, you can go into the app and add "Transitions" so the mop turns off the carpet ride up feature and goes over the transition. My transitions are fairly low and rounded, so if you have high transitions you might have a lot of trouble getting the mop to clean your whole house. You can check the iRobot website for specifics on the transition issue, but if you think the mop will struggle with your transitions and you have a lot of them, I would say the mop almost isn't worth it. Too much work to get it to work! It also won't travel over carpeted areas, so if you have carpeted areas that the mop would need to go over to get to your hard floors, you would have to carry it to the next room. I also feel like the mop got stuck more often than the vacuum. It got stuck twice under my couch, and once under a night stand. It hasn't happened again because it seems to learn about tricky spots, so it might be best to run it the first few times when you are home. My least favorite feature about the mop is that you have to use specific cleaners in the tank, otherwise you void the warranty or risk clogging the machine. You can only use the special Braava solution or the Bona Hard Floor Cleaner, both of which are not exactly cheap. I dilute the cleaner more than the bottle's instructions say to make it last longer, which is fine for dusty pawprints, but if you frequently spill jelly or soft drinks on the floor, you might have more trouble. The washable pads are also quite expensive, close to $20 for two! The machine does come with a washable wet mopping pad and a few disposable wet and dry sweeping pads (which are also expensive), but the washables seem to hold up well. I have three that I now rotate. I have also found that the mop can only clean about 800 square feet on one tank. Our main level is around 1700 square feet, but if I set the mop to only clean the main living areas which always get dirty, it works just fine. I have the mop scheduled to clean the kitchen, dinging room, and living room twice a week, and then I will manually tell it to clean the bedrooms, bathroom, and laundry room when it's needed. This way I only have to worry about filling the tank twice a week, and I save money on the cleaner! So, a great purchase if your entire house (or at least the main living areas) is hard floor and you have few transitions. You will likely have to do a deep clean every once in a while with a traditional mop, but so far I'm quite happy with how well the Braava cleans my floor. Edit 8/11/2023: I've had this mop for a couple of years now, and though it still works, it's encountering some issues. One of the charging pads on the home dock is rusty and needs to be scraped down so the mop can charge. It sometimes says the tank is empty even when the tank has just been filled. It doesn't sync well with the Roomba vacuum and I'm not sure why, so it just wasn't running for a while. When it does work, it still cleans well, but it can be kind of a pain to make sure it's functioning and some error code isn't keeping it from starting. Though I'm still glad I purchased it initially, I feel like for the amount of money we have to dish out for these machines, they should be problem-free for longer. Edit 11/2/2023: Well, now it's leaking, which caused damage to my floors and baseboard. I checked that the tank cap was tightened properly, yet every time I install the tank I'm having this issue with water puddling around the robot. Very disappointing. Customers pay so much money for these products, and you can't expect more than a few years out of them, so I guess now in retrospect I would rather just buy a cheaper mopping robot so I can afford to replace it every few years! I guess water and robots don't mix... Early on, I did have an issue with the mop going back to the home base immediately after starting and not doing a job, but customer service was able to help me re-set it.

It doesn't work. Where can I take to resolve problems? Services.

We purchased the Irobot Braava Jet M6 about a year after purchasing the Irobot J7+ to clean highly polished Porcelain floors similar to that shown in Figure MP1. We have tried the Braava several times prior to this review using the three modes of (i) mapping, (ii) dry mopping, and (iii) wet mopping with only filtered water. The most interesting result compares the Braava dry mopping with the J7+ ‘vacuuming’ of roughly 600 square feet of polished porcelain (to be described below). Mapping: The M6 does a good adequate job of mapping the house although it has some inaccuracy in the placement of doors and walls – the J7+ provides much more accurate maps. For example, the M6 erringly inserted a small pathway between our adjacent laundry and guest bath rooms. We able to correct the map by inserting a boundary line using the map editing mode on the iphone. Some of the mapping errors most likely occur because when the M6 backs into an object or partially runs up on a rug, the M6 spins its drive wheels while the M6 platform remains in place. The counting of wheel rotations can result in distance error when the wheels rotate without moving the platform. Several wheel revolutions (without platform motion might produce 6inches of error in the distance. Additionally, whereas the J7+ uses a camera to accurately map, the M6 apparently uses sensors such as an xyz accelerometer to measure changes in speed, a gyroscope to measure changes in platform angle, and a sensor to count wheel rotations to determine movement distance. Consumer grade accelerometers and gyroscopes have some inherent error. But, nevertheless, the M6 does a good job mapping so long as boundary lines are added by using the software. Docking station: The M6 returns properly to its docking base for charging despite the base being relatively close to walls and objects. Our base sits about 1 foot from a wall and washing machine. Works great. However, we did find the unit became confused and only docked with difficulty when the docking station was within an inch or two of a side wall. Presumably the M6 detected light reflected from the wall rather than that from the docking station. Just to be clear, the docking work well with the 1 foot spacing. Spots: We tried the M6 wet mopping using only filtered/distilled water. Once the mop encountered dirt or grime, the remain portions of the floor became spotted. Presumably, a neutral PH cleaning solution would help with the problem but any time water remains on the floor to evaporate, any dissolved minerals etc. will show as spots. The wheels did not leave streaks beyond the first foot or two at the start. This review will be updated as we deal with the spots. Dry mopping: We were very impressed with the dry mopping ability of the Braava M6. First, the J7+ ‘vacuumed’ about 600 square feet of polished porcelain; it removed particles and dust as much as possible. We next ran the M6 through the same 600sf. Figure MP2 shows that the M6 removed dust and hair left behind by the J7+. This confirms our previous test where the J7+ ‘vacuumed’ about a 1000sf of polished porcelain and then, about 1day later, the M6 dry mopped the same 1000sf – see MP3. It should be pointed out that the M6 could not remove larger particles than dust or hair. We recommend the Irobot Braava M6. While some features can be improve, they would perhaps double the cost of the unit to bring it on par with the J7+. The M6 does a good job and worth the money.

Update - May 1st, 2021 We have now had this product for nearly two years. We still continue to use it a on regular basis. I have reduced my overall rating from four stars to three stars. Here is why... The good: - In general the product is still functioning quite well - While originally we purchased it strictly for the wet mop function, we find ourselves using the dry mop function regularly - does a great job getting all the little things the vacuum leaves behind! - Wet mop function works well and since I'm out of warranty, I run non-iRobot cleaning products through it. Haven't had any problems. - Love the fact it is mostly silent and can run during the day while people around without disrupting the space - If you are committed to running it at least a few times a week, your floors will look pretty good overall The bad: - Several moving components have broke. For example, the lid on top where the water reservoir sits broke at the hinges. The first one broke in about a year and the other one recently broke. In general, seems like a weak point in the design. Another example is the little spray nozzle in the front is now popping out. I was able to repair both situations with some glue and tape. - It no longer can dock itself. These little robots cover a fair amount of milage over time and the wheels begin the wear. It is clear the tread is no longer gaining enough traction to pull itself up onto the charging cradle area. I suppose you could call this general wear/tear... - The navigation and ability to clean areas in a consistent way doesn't appear to have improved. Many others mention the tire mark issue which I also have regularly. I find running the robot with distilled water helps. I've even ran distilled water with a bit of white vinegar in it. - As an extension to the last point, the software and navigation almost seems to have got worse in the last few months. It has a tendency of getting stuck or a bit lost. I've wiped the memory, ensured there are no obstructions and still it sometimes will just stop and error. Ultimately why I reduced from four starts to three stars: When I originally purchased the product it cost $500 USD. I feel given the items I've cited above, the original MSRP should have been somewhere between $350 and $400 USD which is what you can get them for today. I do not believe the original cost matches the long-term value proposition. The product particularly looses points for the physical components failing on the lid. The software has received updates but nothing I would consider noticeable or addressed the tire marks issue in some creative way. As iRobot releases new products in the future, I will no longer take a gamble on next-gen or flagship products. I will wait a year until the price drops or buy the previous generation. Original Review from June 2019: Overview: I will be updating this review over the next several months as this product is used in my home. I personally have been an owner of iRobot products for several years. I owned the Braava 380t prior to the Braava Jet m6. I have about a 1,200 square foot kitchen and great room area that is all laminate style flooring. We spend most of our time in these areas. Dark floors that show every little thing. Two cats that like to shed. No thresholds in between spaces. Rest of the home is carpet or tile. Day 1 Review - June 16th, 2019: The Good: - Setup was simple as with all iRobot products - Connected to wireless network in minutes and integrated with Amazon Echo right away - Packaging is well made and what you would expect from a higher cost product - First mopping job is running as I write this review and seems to be doing a reasonable job - It did about 1/3 of the space in about an hour. It is back on the dock charging since it was only about 50% charged upon arrival. - Floors look fresh and the included bottle of iRobot brand wet cleaning solution smells nice - Major, major upgrade from Braava 380t is the auto dock and recharging capability - worth the price of admission for previous Braava 380t owners! - It is my understanding it will learn our floor layout over time and we can selectively identify which rooms for it to go clean. I'm really looking forward to this since we often do not use our Braava 380t in every room but just the ones that need some extra cleaning - kitchen especially! The Bad: - Not thrilled about the high cost of wet and dry mop disposable pads (roughly a dollar USD per) - Limited approved cleaning solution options. iRobot's support site directs you to use iRobot brand cleaning solution only and it will void the warranty if you do not! - There is a support article for the Braava 300 series that indicates the use of Bona Hardwood Floor Cleaner, Clorox Ready Mop and water are the only other non-iRobot pre-approved cleaning solutions. The Braava m-series documentation does not. It says only to use the iRobot brand cleaning solution. - Navigation back to the dock needs improvement. It does not take into consideration the area it has already mopped. Not as big a deal for dry mopping or vacuuming but when mopping it can leave streaks. I am hoping iRobot can adjust the logic to do a trim pass or similar along the exterior of the space to reduce the amount of streaking that can happen. Final thoughts (for now): - If you get excited by technology, love integrating things in your home and value your time more than things like mopping the floor, I personally feel this is a good purchase. - Looks and feels like a $500 USD product - modern look, great integration with mobile app and third party systems like Amazon Echo - Major upgrade from the 380t - auto docking, water reservoir, floor mapping and connectivity features - Would like to see iRobot create a partnership with a few liquid floor cleaning solutions that would be considered "approved" and not void the warranty - Would like to see a "bundle" option where I can buy the pads and the cleaning solution together