M.P.
Not a lot of people are going to have experiences with this, since it's really only available in your area, Austin and Provo (I think). My area is on the agenda for development and I can't wait! Just the potential that I won't have to deal with Time Warner or AT&T anymore makes me giddy.
The google basic is going to be comparable to U-verse speeds, I would think. It depends on what tier you have with AT&T. The "Pro" plan is actually less with the "Elite" being slightly more than Google basic. You can actually go to their website and it will do a clock of your current speed and use that to compare.
I'm a techie, and I personally would go for the next tier up since we do a lot of streaming content, and the TB of cloud space really appeals to me (which you don't get with basic). The cloud is where it's at and I don't keep anything stored locally anymore.
Anyway, hope this helps.