Went back to Comcast last month, but didn't last long (some kind of SA box).
No 30 sec skip, only 4 channels in the guide with the rest being advertisements, slower than an HR-21.
3 movies and a football game took up 1/4 of the hard drive space.
With Tivo, I can copy DVD's over to it, and the kids can operate it.
Tivo can archive to a computer. Ever try using firewire on a cable box? HA.
Customer Service is technically adapt at Tivo. For cable companies it's Shareholder...