TV has been very good for us since it was first installed a little over 10 years ago. Recently added Comcast voice to my account so I could cancel the highly expensive AT&T landline. It can honestly be said that Comcast voice is much better than a POTS AT&T landline. No problems with Comcast the duration of tv and phone service thus far.
Update: I just convinced them to sign up for the triple play. So far all services is good,
TV: No pixelation, clear HD. Swapped out 2 small adapters to HD boxes
Phone: Much better than ATT
Internet: 25/5 consistent on the Wireless Arris modem