I've eaten at many a Primanti Brothers. This store in the Waterfront is now my favorite. Downloaded their app received a free sandwich last week. Because we ate there last week and scanned the receipt using the app, we were eligible for a free fish sandwich on Friday only during Lent. This is not why it's my favorite place.
We ate there on a Saturday during lunch. The service was super fast and attentive. So going on a Friday night during the dinner rush we were lucky to get one of the last tables. Ordered a drink from the bar and both had the fish. Let me say the food nearly beat the drink to the table! The fish sandwich was every bit as good if not better than any local fish fry.
So all that being said, if you are from out of town, I suggest you try a Pittsburgh favorite. Try any of the many sandwiches with coleslaw, fries and choice of meat on thick Italian bread and you won't be disappointed!