La Piazza al Forno is bad. I've had it twice. Once they undercooked it to the point where the dough in the middle was raw. The second time it was burnt and cold. All the nice ingredients in the world can't save them if they can't cook properly and consistently.
Bianco is good, and luckily you don't have the gigantic wait for them like you used to. I'm also surprised they are still so high considering Bianco is retired.
Cibo's is good too. Spinato's and Stumpy's if you want greasy pizza. As is Vito's if you live near the west valley and want deep dish.
Phoenix area is shockingly great at pizza.