Replacing your Comcast Cable modem can be a great way to boost speed, save money, and solve reliability problems that plague a lot of older Comcast Equipment. I've previously advised clients to stick with Comcast's rented equipment, as it seemed easier to get Comcast service when you used their equipment. Setting up a Comcast Cable modem was also cumbersome at one time.
My experience tonight has me changing my tune. I bought a Comcast cable modem (around $89), plugged it in, did some configuration, which a friendly Philippine call center rep will be glad to help you with, and I was off to the races. Tomorrow I'll return my old modem and laugh all the way to the bank while counting my $8 in monthly savings. Oh yeah, got a 25% speed boost to boot! Check the before and after!