First, let me say, the pizza is some of the best I've ever had. Generous toppings, and a flavor that can only come from a well seasoned oven.
Then why one star? The service. Waiting 45 minutes just for drinks? Over an hour for the bill? It's madness. I have been many times, the pizza is just that good. But, last time I neared my limit. Rude staff who you can hear talking crap about the customers from the back room. Never once getting a beverage refill in over an hour. What the heck!
It's a Pittsburgh legend for a reason. Good pizza. Nobody would dare say the same for the front of house staff. There is a competitor in turtle Creek that makes similar (but not quite as good) pizza. The service and management is light years better. Drive that extra mile, safe yourself a metric ton of frustration.