I have internet and phone through Cox.
Phone:
Reliable
Cheap
Great voice quality
Internet:
Fast - 95-105 mbps download speed (I am paying for 50mbps, they doubled it for free)
Dependable (I work from home now, saved money on gas pays for cox bill)
Cost is average
I had CentryLink and the best they could offer to my home was 7-8mbps when I was paying for 12mbps. It was so unreliable that I drove into the office every day. Its been a few years now and Cox has provided excellent service.