I have uverse TV and internet at my place for about 2 years now. Only problems I ever had was first a defective DVR, called them and I had a new DVR in 2 days. 2nd problem was my at&t router died, called and had a replacement on my doorstep next day.
Never had any internet problems without them calling and telling me first, we also have business class internet from AT&T at work, and every problem we had with that was our fault.
Business Customer Support is terrible but for home its not bad.
IDK if AT&T does this but if they try and get out of running cables in your house do not let them!! Had Comcast before, and I have a room that they needed to run a cable too and said they did... Come to find out the Comcast guy setup some kind of wireless receiver in that rooms wall and then ran a RJ-45 cable from the receiver to the computer.... Worked fine before i switched, once switched i thought it was att so i called and let them know i just switched from comcast and the support guy had me remove the faceplate from the wall, told him what it was, he sighed and told me i got Effed over... Long story a little bit longer, att support got a guy out to my house and he ran me a cable for free. Could of ran it myself but for free I didnt refuse
Either way good luck!