Motorola SURFboard SB6121

This modem was a great price at my local Costco ($75). Called Comcast, waited on hold, gave them my MAC address and my speed jumped threefold. At $7/month for a rental (that was getting outdated), this modem will pay for itself in no time. The unit is very small and unobtrusive. Buy this one with confidence.

I bought a new Macbook pro (9/2012). When I did my Internet access slowed noticeably. I figured the newer technology in the Macbook must not like the older technology in my modem. The new modem arrived -- I called Comcast and in about 10 minutes they had it set up. I plugged in my Airport Express (previously purchased) and could not make it work. Lots of blogs online about this. I struggled for about 3 hours. Finally gave up, went to Best Buy, bought a Netgear router, and in 10 minutes my Internet access was faster than ever. I use citrix at home for work. With my prior modem I would get "punted" every 10 minutes or so. Turns out it was my modem. Now citrix works great. I am writing this review because I am impressed with the modem and the netgear router. I spent about $150 combined. Definitely worth it.

I have had this modem for just under two years and it has always worked great. The only time I had an issue was after a lightning storm that produced some sort of power surge on my network. It wiped out or damaged four devices including my modem. Motorola shipped a replacement right away. In the meantime I rented a modem from Comcast so I was only without service for a short time. I bought the modem brand new for about $90 and it came with a two year warranty. At the time, Comcast was charging about $7/month to lease a modem. Which comes out to about $168 over the two year warranty period I have with the device. So, if my modem decides to fail next month when my warranty expires (I don't expect it to) I am still ahead by over $70.