It really depends on your area. It kind of sucks in my area. I use Time Warner Cable instead, its cheaper and faster. No caps or anything either. Now, some guys at work have U-verse and they claim to love it and that its super fast and stable, tops out at 20 meg where they are (same uverse speed for me but my cable is 35 meg).
I'd say its worth trying as long as theres no contract and you can back out if it doesn't work well for you.