I wanted to reduce my monthly cable bill and I already owned a wireless router I liked. So I called Comcast and asked them about compatible cable modems. Of course, there are many to choose from, some even having the XFinity name brand right on the box.
This modem was the cheapest in terms of what was on that list. I figured "why not" and bought it.
I came home, plugged it in, and plugged in my wireless router. When I tried to connect to the internet, the XFinity login screen appeared, and all I had to do is enter my Xfinity login and password (the same one I use when paying my cable bill).
The XFinity website then set up everything and it seemed to work fine.
I did have some trouble with the website popping up again a few days later and re-configuring my modem. On a hunch, I configured my wireless router to clone the MAC address of the computer I used when logging into the XFinity website. Typically this is a setting that can be found on your wireless router's configuration page.
Ever since then, the modem and router have been happily working together, and I haven't had to re-log in to XFinity. The performance is very good, as I regularly get 85MB/s download, which is the plan I signed up for from Comcast.
I don't particularly like Comcast and probably will be upgrading to Google Fiber or AT&T fiber - both will be in my apartment building in Atlanta soon and I'll be looking at 1000MB/s rates when that happens. Until then, this cheap cable modem delivers on the goods at 85MB/s for a fraction of the cost of the other options.
That's great in my book.