I have comcast. Im overall happy with the internet, few issues. I am a former ATT customer and that was a nightmare. I'm much happier with Comcast's billing procedures and love the fact I can use an app to pay the monthly bill.
I have been a customer of Comcast for about 3 years now. The internet upload and download speeds are pretty good. I like that I am able to sign up without a contract and still receive a discount. Comcast has fair customer service.