NETGEAR Nighthawk Cable Modem with Voice (CM1150) - Certified for Xfinity by Comcast Internet & Voice Plans Up to 800Mbps | 2 Phone lines | 4 x 1G Ethernet ports | DOCSIS 3.1

I was weary of some negative reviews at first, but after reading online reviews from reputable sources, and trying it for myself, this modem is simply amazing!First off, setup was super easy. In a nutshell:1.) Power it up.2.) Connect Ethernet cable from modem to laptop and go to xfinity.com/activate3.) All you need to do is login like you're about to pay a bill and that's it - no account numbers or anything!4.) CALL XFINITY TO ACTIVATE YOUR EQUIPMENT!!! Do not skip this step!5.) Tell them the Serial Number and MAC Address (DOCSIS 3.1, not the DOCSIS 3.0 - look closely on the unit, not on the box, there are (2) MAC addresses, provide the 3.1 number).6.) Connect modem to router via Ethernet (Cat 6 minimum), connect phone line, and you're gucci.Literally all those steps took me less than 15 minutes, including the call to XFinity.I had been wanting to switch to my own modem and start saving $11 per month (plus taxes) for a while, and finally decided to go for it. I hated paying the rental and then I also found out another little detail, you know that free XFinity hotspot thing they keep talking about, ever wonder where that comes from, that's right, your rental modem/router. That sucker is turned on by default and XFinity is using your electricity to power up a public XFinity hotspot. Totally lame, I killed it ASAP in the XFinity My Account application as soon as I realized that. Next thing I did with the rental was turn off the WiFi by switching the unit into Bridge mode. Just some advice for people still renting. I highly recommend switching to bridge and using your own router, it's way better than theirs. Better yet, buy your own modem and route. Ok, rant over, back to review.It is easily two times, if not three times smaller than the rental modem/router unit. Kinda goes as a given since it's one device replacing two. And to that point, it is better to have two discrete devices than two devices in one package for reliability and ease of diagnosis. The device is also very discrete looking and sufficiently aesthetic, at least to me, to be in plain sight. Overall, the build quality, construction, and overall perception does seem to line up with the price tag. I feel like I'm getting my money's worth for the time being. Reliability will ultimately solidify or uproot that.It boots up way quicker than the rental (~1-2 min) and performs better. The latency on my speed tests went down from 12-15 to about 7-9ms aand I'm getting just slightly better downloads but not by much. However, this is one of two of the only XFinity approved DOCSIS 3.1 modems - think up to 10Gbps connection. Now I'm on blast - 250mbps (getting all 250 and then some) but am thinking of going to 1Gbps. And while we're dreaming, this modem will do 2Gbps with link aggregation, but the software update is still in the works. Basically two Ethernet cables from your modem going to your router, each 1Gbps but acting like a "single" cable to provide 2Gbps of total throughput. Way out of the league of most people, but XFinity does have a 2Gbps option over coax so I figured I'd throw it out there.I have only had it for a few days, but was so thrilled with the easy set-up and exceptional performance, I decided to leave a review. I will update ofcourse over the years with reliability and how it holds up, but so far, very promising.

I bought this modem because I am a new Xfinity (Comcast) customer and was having major coverage problems with their newest high end modem/router which I chose to rent when I moved in a month ago. I am paying for 400 mps service and according to Speedtest I was getting 285 in my office near the modem/router, 165 in the kitchen at my wife's desk PC and zero in the master bedroom which is at the opposite side of the house. I also could not keep my Orbitz wi-fi sprinlkler control, which is mounted outside on an exterior wall, connected to the network. Lack of adequate signal strength appeared to be the problem. According to the Xfinity website, this Netgear Nighthawk modem is compatible with the services I am receiving from them. I bought this router on Amazon and coupled it with Netgear's Orbi router (with one satellite). Installation was very easy especially registering the modem with Comcast/Xfinity which was all done online without the need for a phone call to customer service. In minutes my modem was registered and I was installing the router/satellite. Very nice service Xfinity! With the new modem & router combination I am getting 500+ mps in my office, 450 at my wife's desk, 285 in the master bedroom and 270 at the Orbitz sprinkler box which is now rock stable on my network. What a difference. I returned the rental and will see $13/month savings on my bill. That's nice but the improvement in performance was the objective and I couldn't be more pleased.

My family has endured angry outbursts, grumpy attitude, and me cursing at this thing trying to get it to work. In addition they were deprived of one of the most valuable human needs: WiFi. Read on if you want to read a story of hope, heartache, and restoration. tl;dr this Netgear modem sucks.I bought this one because my Xfinity Double Play (150 Mbps internet + Cable) package expired and was charging me $60 more in fees. Calling Xfinity, they were able to lower my bill. Double Play and Triple Play happened to be the same price with current promotions. Thinking I was getting a good deal I signed up for the Triple Play not knowing that I would need a new modem (shame on me), as I was on an older DOCSIS 3.0 modem w/o voice support, and Xfinity was unable to finalize my order until I installed a modem that could handle voice.I was NOT going to pay the $13/month to rent their modem, so I decided to jump online and grab this one. I was ecstatic that it was arriving the next day! That was the only good thing about this whole story. I set it up and had the WORST time trying to get it to activate. The connection from the Ethernet port to the laptop was laughably slow. I had to refresh 10 times and wait for the next page to load through the activation process, hoping it wouldn't timeout and lose my progress. It finally went through and was able to activate the new modem. This should have been a huge red flag, but I tend to slog through problems and apparently am a glutton for punishment. Read on.Fool me once: The issue is that the internet was a tease. It would come online for a few minutes and then disconnect for 5+ minutes. You never really knew when it would come back online or for how long. Then it would come back online, then go off again. I called Comcast but they were only able to send a reset signal to the modem once in every 2 calls. It was an awful experience, especially for someone who has to work from home a couple days a week.Fool me twice: I finally identified that the major change that caused the issue was the modem, so I decided to replace the original one for a new one. Amazon is awesome and sent one within 2 days. I was eager to get the one "fluke" modem out of here and install the new one. After another call with Comcast, they were able to activate the new one. It seemed to be working great with amazing speeds... until it didn't. Internet started going wonky and once again I was being subjected to the schizophrenic connection.After wasting valuable time trying to get this thing to work, I finally called Comcast and asked them to move me back to Double Play and re-activated my old modem, the trusty Surfboard, and haven't had an internet connection issue since.During this whole ordeal I was on the phone with Comcast at least 10 times, for a total of 3.5 hours, not including the couple hours trying to troubleshoot, power cycle, etc.Now that I think of it, I recall in the past having Netgear modems before my Surfboard and had to RMA them every 6-12 months because they would crap out. After a power cycle they'd work for a bit, then go back to spotty internet. Seems like they never fixed those issues even after all these years. If you've made it this far, you must also be a glutton for punishment. Please don't punish yourself by buying this modem. Learn from my experience and pass on this one.