If you're new to the Burgh, you may want to give them a try.
1. They are cash only (they offer a atm onsite for a fee)
2. A small pie with one topping is moderately priced, i.e. $15
3. It's a cross between a New York and Chicago pie, but minus the deep dish.
4. Great pizza when it's hot right out the oven, but not the greatest when reheated the next day
The 3 Stars reflect the issues with it not being as tasty the next day, and the inconvenience of not taking cards; for the price you pay for food, cards should be accepted.