There has recently been a crop of these restaurants in the Phoenix area as far as the make your own pizza concept goes. After having tried MOD Pizza and My Pie I still prefer Fired Pie the best. The main reason being that the toppings they use is of high quality and you can definitely taste the difference.
I would say that Fired Pie is one of the better, if not best option inside the food court right now. I've been here on a few occasions and the pizzas have been very good each time, with me slightly tweaking the options for toppings to get a different pizza. Best part is that you can get as many toppings as you want and it will still be at the same price.