So I got a Tivo in January.
I thought that by returning the Comcast DVR, I would end up paying $10 less a month, on my bill.
It turns out that Comcast then adjusts the "credits" I get on my promotion, actually causing my bill to go up by $2-3.
I tried talking to a rep on the phone, but it doesn't look like there's much they can do. I'm going to go to their on-site store and just see if I can talk to someone. I don't expect much to be done, but it just seems better to talk to someone in person.