We use Comcast for both cable service and high speed internet service (cable modem). We pay about $100 per month for both services. They charge $5 as a late fee.
For cable TV service, we get enough channels to entertain ourselves. For high speed internet service, it's very convenient since internet is ready to be used whenever I want to use it compare to dial up. Speed of internet connection is pretty fast although sometimes we have hard time connecting to the internet (due to a bad weather?).
We are pretty happy with both services, however, I feel the cost of both combined ($100 per month) is a little more than competitors.