I've been to some of the best pizza spots in Pittsburgh, and around the country, and Iron Born definitely sticks out as one of the best. The difference between a typical Chicago deep dish is that i leave feeling satisfied, and not wanting to crawl in a bed without moving for 2 days. Lou Malnati's in Chicago will always be my favorite deep dish, but Detroit may be on to something with the thick, crispy and oily crust.
It's a MUST try at Smallman Galley. The Red Pie and Spicy Pie are my personal favorites.