Primanti brothers is a "gotta go" type place. They don't give great food, they put fries in the sandwich and don't really balance it with the meat or cheese. But it is iconic and has a unique charm to it. Nice servers, fast service, and reasonable prices give it a lot of positive reviews as well.
If you're expecting a culinary masterpiece go elsewhere. It's more of a novelty with a pretty good taste and incredibly fresh bread.