I am from back east and consider myself quite a "pizza snob". I am real picky about the types of crust, sauce, and cheese used in a pizza.
That being said... Fox's Pizza Den is one of the best pizza places that I have eaten at here in Phoenix! What really separates them is their cheese, I'm not exactly sure what it is, but it's not just plain mozzarella or provolone... they use some sort of blend that makes a much better tasting piece of pizza (my guess is Romano). Their crust is very soft, and from the few times that I have had it, very consistent.
Don't be thrown by their cheesy name, their pizza is pretty darn good.