xfinity/comcast/whatever is all there really is around me besides satellite. I've had no issues with them in the years that my family, and now myself, have been a customer. I'm on their fastest internet speed, and even with wifi it's still pretty damn fast.
Customer service is iffy (phone wise) depending on what call center you get connected to. The ones around here aren't too bad. I'd say all technicians are pretty darn nice too.
My man works for comcast as a technician anyway, so if you have any specific questions, don't be afraid to shoot me a PM