I had U-verse installed three weeks ago. Many problems with the installation.
3 Tvs, internet, and 2 phone lines. After the initial installation, the tech was going through the remote with my wife and me, and the picture on the tv in the kitchen started to freeze. He had already been at the house for over 5 hours. He said call back and ask for him, he will come out and fix it (it was after 7pm).
The next day, all the tv's started freezing. I also noticed that my second phone line was never hooked up and now doesn't work. I called AT&T and they said the soonest they could fix the phone was two weeks. The tech for the tv problems could come the next day.
The next day the same tech came out. He was a very nice guy. He was going to replace all ends on the coax cables and try to find a splitter that he thought was hidden somewhere that may be causing the problems. When he left, the picture was still freezing, but not as much.
The next day a called and had another service tech come out. Within an hour he had the tv's working. He changed the ends of the coax in the walls as well as did something on the box outside.
Since then, the picture has been fine. Another tech came out on Oct 18, to fix the phone line. That is now working fine.
In regards to picture quality. I had Dish before this. The general picture is very good, about the same quality as Dish. Football can be a problem, but it depends on the channel and the day. Some games had noticeable pixelation, but others where fine. Tennis has been fine. In general, the picture is ok for me.
I did recalibrate the TVs to optimize the picture. The tv guide is good and not too slow for me. I like the features it has. The Dish guide was slow and changing channels on the Dish took forever. Channel changes are quicker with U-verse. Internet has also been ok. I am in Connecticut.