Works great and easy setup. Xfinity phone service works excellent, and our internet even seems faster and connects better too! We shopped around and this was a better modem for a better price than competitors. Quick shipping and packaged well. You have to register the modem with Xfinity but that’s with all of them. The person I connected with helped a lot. Xfinity phone service with this modem sounds just as good as landline, NO delay. And the Xfinity phone service costs a fraction of what the landline companies charge!!! Thank you Best Buy for the excellent modem!

Works great! Pairing this with a Netgear Orbi RBR50 mesh system, with Comcast 600Mbps internet. Upon using the Netgear app to test my speeds I once got a 617 down/7 up. Testing with Speed Test I got a similar number. Setup was simple to get rid of the $15 rental fee. I just unplugged the XF modem/router, plugged in the Arris via LAN to my laptop, and when trying to connect via Firefox it detected the new modem and started the setup. After about 15 min it detected the phone line of service and I was online! Easy! Didn't even need to call their customer service*** ***Do not use the XF app to on Android or iOS. I can't recommend it. It's ability to set up my modem required very specific criteria: first, I needed to have a a modem and router setup prior to changing the old modem for the new one. Then, without disconnecting the router, I would need to switch out the XF modem with the new one then try connecting to the network again. The app would then work, saying I would need to set up my new modem with XF. BUT, if don't want to set it up with a new wireless system (like I did this time), there's no way you can use the app to setup just the modem since there's no active wireless system available to connect to. And while I was on caller support they kept advertising the app, but not providing ample solutions to trying to connect me to the internet. Besides that, modem is working great! Save yourself $180 a year and setup a 3rd party modem.

Super easy to set up and works well. I did have to chat with Xfinity to get it to work, but 10 minutes later we were back online. It does have a large footprint, but we made it work. Doesn't seem to run as hot as my last Arris modem.

Nice to get out of renting one from ComunisCast but now I always have a voice mail signal. I guess you can never get away from the grips of them. The unit performs as advertised. No more rental charges but only works with "Comcast"

I previously owned a similar ARRIS cable modem TM822G, which served me very well for 4+ years and saved me lots of modem rental fees. While it still performed well, I realized that I was not taking advantage of the speedier internet subscription speeds I had with Comcast. I needed a new modem, specifically with VOIP, but I did not want a built in wifi router since i wanted to set up my own mesh network. Found this at a good price at Amazon, and Best Buy easily matched it. I don't think set up is difficult, but it's not self service with Comcast. You do need to call in and provide the MAC address to the service rep - this part took me 3 hours - because of the quality of the Comcast service rep and their process. They managed to type in the MAC address incorrectly twice, and was unable to correct it. They kept passing on to other reps to figure out how to delete a saved MAC address. One rep even said I should return the device and get a new one to key in a new MAC address!! Finally after 2.5 hours, I found a service rep who knew how to correct MAC addresses, and I was up and running in 20 mins.