Ok, don't live in the Hill District, Arlington Heights, or the North Side. There are several bad areas in Pittsburgh and some good ones too. Arlington Heights and the North Side are considered bad. The Hill District is the poorest and most heavily crime-saturated area in Pittsburgh, but the other two aren't incredibly far behind. Maybe living in a "bad" area doesn't bother some, but trust me, what you want to do is live on the EAST side of Pittsburgh where there is a bus that goes from your stop straight to Oakland. You don't want to take two buses or travel through downtown. It is nice and helpful to be close to school. The following areas fall into that category: Squirrell Hill, Shadyside, Regent Square, Friendship, Point Breeze, Oakland, and Highland Park. Highland Park and Regent Square are the most diverse out of the options and on the cheaper end. I live in Regent Square and think it's artistic, friendly, convenient, and cool.
If you have any questions about where you should live (e.g. is it safe, expensive or cheap, or close to school) PLEASE e-mail me and don't go off of what these out-of-state Pitt Law students are telling you. At the very least, ask someone who has lived in Pittsburgh BEFORE starting Pitt Law.