Comcast is the worst cable TV service I've ever experienced. And I have been a consumer of cable services for over 20 years, living in many different cities all over the United States and Canada, so I have plenty of experience with cable TV services.
Since February 9 (today is April 27), I have had no less than 10 service appointments with Comcast because our cable TV reception, boxes breaking, and "not authorized" messages which cannot be fixed over the phone. Three of these appointments, a Comcast technician didn't even show up or call.
Oh but they sure remember to send us a bill. Almost $250/mo with our Internet and Telephone services included. But I think I could pay them $100,000 per month and still get crappy customer service. Their people at their phone center (you get to speak to a different one every time) have no clue what they're doing. About 1/3 of the time, when a technician has showed up, they tell me that the problem could have been fixed over the phone.
I hate Comcast, and if I had *any* choice for my television services, I'd switch immediately. Unfortunately, our apartment faces exactly the wrong direction to get satellite, so we're stuck.
I strongly urge you never to use Comcast services. They are, by far, the worst in North America.