Ok, I will chime in on Comcast (where I worked over over 20 years). I had their service here in Atlanta since they bought it from the old AT&T Broadband (about 6 years). Comcast had to put a long of $$$ into rebuilding the system to also offer their internet service. While I had their service (both cable & internet), they both ran fine and I had only a few outages over that time. Before I had Comcast, I did have DSL for a couple of years and liked it fine. I only switched to get both cable and internet from the same provider. Comcast's internet service was also faster then DSL. Over the years I had Comcast (in GA and in FL), my experience with them was very good (not just saying that because I worked there), and their customer service was also very good.

 

I now have Uverse and so far I am very happy with the overall service. I have only had one instance where my internet went down for about 2 or 3 hours, and the TV picture quality has been good. They had some pixal problems with the pictures at times, but I have not notice that as much recently. As Pip said, a new product will have growing problems, but I think things are getting better and will continue to do so.