In a word...WOW. Yesterday I had AT&T U-Verse installed at my house. My installation was the U-400 TV and Elite High-Speed Internet package. This product is amazing. I must say when the installer said, "I am running the Coax cable to the office for the gateway, then CAT- 5 to the TV", I was gitty.
Microsoft has done a great job to make this service feel like Windows Media Center as the UI is the same blue bubble look. It is a little harder to get used to the channel structure as you get a million (or close to) SD channels (range 0 - 800) and about 25 HD channels (range 1000+).
One thing the rep who came to the house after the installer had the DVR hooked up let us know is that even though the service seems full featured, there are more features that will be coming out this year. Features like integration with My.yahoo.com for pictures, whole house DVR, and much more. Currently the package will get you 2 standard units (with HD support) and one DVR box (with HD support/recording). Using the DVR, you can record 3 SD channels, or 1 HD and 2 SD, and watch another channel at the same time. This is very nice, but I hope more HD recordings at the same time will be a future feature as I am addicted to 720p/1080i.
The best feature about the whole package is with phone/internet/tv, I am saving $20/mn vs my old AT&T DSL and Dish Network setup. Got to love more channels, more features, and less money. You have to check out this package!