Let me tell you something about eating GF pizza; the crust is the same no matter where you get it from and it's not that great.
Because of this, toppings are paramount. Spinato's has excellent sauce and high quality toppings. They make some of the best pizza in the valley.
They're also really consistent across all their locations; or at least the 3 I've tried (Tempe, Chandler, Phoenix).