TV: image quality is utter trash. The worst “HD” picture you’ll see. Comcast, Dish, DirecTV, etc all look better.
Phone: good voice quality. Phone number availability is linked to the uptime of your U-Verse DSL box and power supply, however. If your power goes out, AT&T will give you a battery backup that will kick in, but once that battery is depleted, your phone won’t work.
Internet: not the fastest, but pretty decent speeds for the price. Comcast and especially Verizon are faster, though with Verizon FiOS you’ll wind up paying for that speed.
Customer support: I’ve never had a problem with them over the last 10+ years, though that was back when they were Bellsouth.
What is the Verizon fios tv image like? We have dish too and so many sports packages that we haven’t made the switch. We use fast fios for Internet. If only Verizon had access to all the weird non local teams my guys follow.