I bought this as a long-overdue replacement for my outdated, 11 year-old modem. Set up with Xfinity was painless and took about 10 minutes or so. My speed doubled. So far, I'm pleased with it's performance.

First item shipped to me was not shrink wrapped, modem was not in a protective bag inside the beat-up box and was dusty, manual was used and folded open, and the Ethernet cord was missing. It also had the telltale sticker on the bottom of the box starting with "LPM," indicating that it was a returned item that was put back on the stock shelf. I had to initiate a call with Amazon in order to have another sent to me (web return form does not contain that option), which was actually new stock sealed and untouched. Only after I'd experienced this did I notice so many other reviews which mention getting a used one. Pay attention for the signs of getting a new product if you order, and make them correct it if it's not! Was a very easy setup and activation with Spectrum, and works fine on their network. No issues after first week.

This is an exceptional cable modem and replaced our cox hardware. Installation is simple and straight forward. This device out performs stock hardware in every way. The signal quality is very stable, speeds are above normal and stable. This device will also save you from paying those pesky rental fees for sub par hardware. It pays for itself over time and offers you a better overall experience with your network. Win, win, win.

Review of Netgear CM1000v2. I got a notice from my internet company, xFinity, that I should upgrade my old DOCSIS 3.0 modem to a newer 3.1 version. Even though my internet package only gets me up to 59Mbps, nowhere near the gigabyte speed offered by the new modems, I decided to replace my old modem anyway, since I was starting to get more internet outages over the past few weeks. I figured the older technology maybe wasn't being supported as well on the network, and I had to keep resetting my modem and waiting for connectivity to come back again. Installation was pretty easy. 1. First, unplug old modem from power, cable and ethernet. 2. Plug all of those into the new modem and wait for all the lights to stay on, which can take up to 10 full minutes. 3. Go into the xFinity app on your phone, log into your account, then tap Account, Activate xFi Gateway or Modem, Your Own Modem, Start Activation, then follow prompts from there. You will need to enter the MAC address, which is printed on the bottom of the modem. It may take another 10 minutes after activation for you to have internet access. All worked well for me and there were no problems. Modem has been working flawlessly for the past few days since I set it up. As I said, my plan only gives me up to 59Mbps, and that has not increased with this modem. It will only increase if I change my plan to a higher speed plan. But, I have a newer technology modem now that is at least ready for future speed increases should I choose to pay for that, and this DOCS 3.1 modem may have better security and more compatibility with the xFinity network. Things I like about it: 1. It has an on/off button on the back. VERY handy for resetting the modem. Much more convenient than having to pull the power plug then struggle to get it plugged back in while in a tight, dark space behind the modem. Many modems do not have an on/off button. 2. The lights are easy to see, but not too bright. On my previous Arris modem, the lights were overwhelmingly bright and flashing, so much that you could hardly read what their function was. These lights are much better. 3. The form factor is good; thin and tall, with a sturdy base. Other note: Some reviewers have said this modem gets HOT. I don't find that to be the case. It is warm, but not really any warmer than any other modem or streaming device I've had, especially one that is on 24 hours a day. Bottom line, this modem is a highly compatible modem for xFinity and all other cable systems, has an on/off button, good form factor, perfectly readable and not-too-bright lights, and is easy to set up.

I don't do reviews often but I want to help my geek friends save days of research and frustration that I went through to finally get the absolute most speed out of my Gigabit internet. There's some golden nuggets here that you need to know. When I first upgraded to the new gigabit here in Denver (from Xfinity), it was using their new Cable Modem/Router device (XB6-A) and I was only getting 500 Mbps download speed. It was also lagging in our house when several people were gaming and others were downloading, or even accessing intensive web-pages. (lagging = pings were going up). Since upgrading to this Netgear CM1000, upgrading my cabling, and factory resetting my router, I'm now getting the most download throughput (~941 Mbps) and the lowest pings I've EVER seen! Connection is rock solid throughout the house. SHORT ANSWER: Get this Netgear CM, upgrade your ethernet cables to Cat 6 (or Cat 5E for short distances) and then Factory Reset your router to get the most speed. You still may need a new router to reach gigabit speeds. I'm getting the most download throughput (~941 Mbps) and the lowest pings I've EVER seen! I did lots of tests comparing this cable modem to the XB6-A that Xfinity provided. Here are some big things I learned: 1) Make sure your ethernet cables going from the cable modem to the router and from the router to your PC are CAT6 or at least CAT5E (for short distances). 2) Upgrading to this Netgear CM1000 Cable Modem LOWERED my ping/latency compared to the XB6-A that Xfinity provided. I just got a 5 MS Ping to the google server here in Denver! UNHEARD OF. Most of the time it's around 8-9ms with this new cable modem. I was getting 11-14 w/ the Xfinity modem. If you're a gamer, a lower ping matters! 3) The Xfinity XB6-A modem/router combo doesn't work too well when you have your own router also connected to it. Xfinity recommends you only use their device and disconnect your router. 4) Around 941 mbps is the max download speed that modern gigabit routers/switches can do right now so don't be worried if you can't get above that. 5) Many routers can't handle gigabit download speeds, especially if you've enabled any of the features like QoS, Traffic Meter, Keyword block, etc. My Netgear Nighthawk (R7000) was only getting 400-500 mbps (using speedtest) because I had enabled some of these features. Even when I disabled these features, the speed was still low. Doing a FACTORY reset fixed it, and now I'm getting 937 - 943 mbps download speed!!! The reason these routers slow down when you enable extra features is because it disables CTF (cut through forwarding) and the router no longer uses it's faster processor. Some of the newer routers can still maintain max download speeds of 941 mbps while also allowing you to use QoS and other features. 6) There's a great website called Small Net Builder that compared routers to see which could reach 941 mbps download speed. I recommend you check that out if you need a new router. Keep in mind that this Netgear CM1000 is JUST a cable modem. It's not a router. So if you only have 1 device you want to wire into it, you're fine but if you want to have more devices, and wireless, then you'll need a router too. The Xfinity provided XB6-A is both a cable modem and a wireless router in one. I personally think it has some flaws that need to be worked out but appears to be a beefy piece of hardware. You can save yourself the $10/month rental by getting this Netgear CM1000. P.S. I do plan to upgrade my router so that I can still get 941 mbps download speed while enabling QoS. With QoS, it will set aside a portion of your bandwidth (say 20%) for high priority traffic like gaming that need low latency, and then it will limit all other connections (like large downloads) to the other 80% the connection. Keep in mind, if you enable this and run a speedtest, it will appear lower simply because it's now reserving part of your bandwidth for other devices/traffic in your home.

I loath Comcast/Xfinity, I hate having only one option for 1G+ internet besides ATT which is another horrible company. Multiple times a year we have some issue with Xfinity and my internet speed falls below 10mbs. The modem router combo is weak and I have mesh system throughout my house to provide internet throughout. I purchased Net Gear router and TP-link WiFi router to beef things up. I was scared about installation and the dreaded Xfinity customer service I would need to deal with. This router was easy, all online, no call to X and no issues. Speed is over a gig and no one complaining about buffering or glitches. Love it!

READ THIS BEFORE BUYING! This product CM1000 was working fine with only 3 disconnections (where you have to restart the router to get internet back on) during a 4 month period on my Comcast Extreme Plus. After 4 months it quit working. It stoped connecting to the Internet (UP stream and Down stream solid failing to establish connection internet blinking) I spend 2 hours of troubleshooting with Comcast Customer support. We connected another router (the old one that I had it worked fine). I decided to call Netgear Customer support. NOW first of all you will talk to Indian customer support! I had problems understanding their English, as well as they had problems understand mine. The first Indian support guy decided to make a factory reset with me, even I told him I already did. He was trying to explain how Comcast should connect my modem and it's working fine, even I told him I already did this several times! However he was reading instructions so I had to work with him for 1 hour. Then call comcast disconnecting the replacement modem and connecting this one back, just to find out it is still not working. I called Netgear back I spend another 30 min with a woman who speaks English even worser than the first guy. She was trying to first tell me I have done something wrong. Well, I spent 1 hour with your representative on the phone following his instructions, what could I do wrong? Or you think its hard to reset a router to factory? I tell you a secret, If he would just tell me reset to factory- it would take 5 min, not 1 hour. Finally she admitted the item is defective, so she agreed to send me instructions to my email how to send it for repair. When I told I got no email she said the email may be delayed up to 1 day. Serious? It takes 1 day for an email to be sent? Are you kidding? Maybe in India- it is ok this way, in the US when I have an issue- emails from customer service take several minutes to send, in fact I receive them while on the phone. Not with this company. Why do you need a 1 year warranty if you have to go thru this mess? I will update my review upon fixing. Honestly I would rather prefer a return for refund to not deal with this company again, but no such option is provided unfortunately. If this altogether will be not solved during a month period or I will have to pay even a dime for shipping- a proper BBB complaint, Florida Department of Agriculture and Consumer Services complaint and a FTC complaint will be filled. I'm also considering to write a letter to the president administration, knowing he don't like business practices like theses to.

Easy to install and it has great speed

We have been helping make our cable company rich for too long. Finally cut cable and purchased our own modem and router to lower our internet bill. Very pleased with the performance of this modem which will quickly pay for itself as we save paying monthly fees. Signal strength is great. Easy set up. It is small and attractive enough to sit on the desktop without being too much in the way. We are pleased with this purchase!

I was very concerned about purchasing a modem that was compatible with Optimum services. Based on my research I went with is this Netgear CM1000 modem. I wasn’t disappointed. It works perfectly . Setup was simple. After connecting it I made a phone call to Optimum technical support to activate it. It took no more than 5 minutes. I’ve only had it a month but no issues whatsoever. I hope this review helps.