I was told that GMP was owned by Charter Communications which is a major national player similar to COMCAST (
http://www.charter.com/). COMCAST seems to be the best as it has a top-notch management team (recall they recently tried to buy Disney).
I am just now trying to get cable Internet installed. They do seem to have a problem with not enough people manning the phones, getting the order wrong, and missing appointments. But, just remember, the real blame belongs with their management and our County Commissioners. So, try to cut the employees some slack when you talk to them. You wouldn't want someone to talk that way to you
Cable is basically a state-sponsored monopoly anywhere you go. It has to be that way because it is not practical to try and share the infrastructure among more than one company. There must be some "quality of service" provisions in their franchise contract. If I get time, I'll try to get a copy of the contract and post the relevant sections. They key is to complain to the Commissioners and make them fix the mess. Otherwise, you are just wasting your breath!
P.S. I have DirecTV now. The service, selection and TIVO are excellent. But the Internet is an overpriced PoS.