HORRIBLE, never ever call them for anything. They called up saying they could save our company money with their phone service, they came out hooked up to their service and then the problems began. Two out of our six phone lines would randomly drop calls and were constantly static so we could not talk to customers. After months of this we finally called Comcast and dropped century link. Comcast has been great and less expensive. Century link then charged us a $2,500 termination fee for breaking our "contract".
Now if there is a contract I understand its my fault if I cancel, we never signed anything with them and they said they are unable to provide acceptance of their terms. We disputed the charges requesting to see a contract or agreement which they said they did not have with us but they are still charging a $2,500 termination fee. After we disputed it a person called back to "read us a statement word for word from her executive team". She had no authority beyond reading us a letter and said I was not accepting that. She said I was "not allowed" to even speak with the "executive team" that wrote the statement and thats it.
Well if you took time to read the contract then at the very first place you should have been aware of it the problem is you just sign a contract without even bothering to review it's terms and agreements and the boundaries of your service providers as well