Wow, people obviously don't understand Primanti's...
I went to college in Pittsburgh, and I think I speak for most students in the Oakland area when I say that Primanti's is a vital part of our memories/experience there. Personally I still get cravings for a steak and cheese (no slaw, thanks).
Bottom line: Primanti's is one of a kind, and I guess Yelpers either love it or they hate it. I for one LOVE IT.