A reasonably good Airport.
Overall, it's one of the better airports we have been to, given the "X" shape it has, with a bunch of kiosks in the center. Getting through the baggage exam area is about as much fun as it is in other places, but usually doesn't take too terribly long. Parking isn't cheap, but it's not totally ridiculous either. The long-term parking option is actually great, and the bus drivers we've met were extremely helpful and friendly the last time we traveled.
It would be wonderful if there were a rapid transit system to get from Dahntahn to the airport, and skin all the traffic through the tunnel and parkway. It's a little rough to get to unless you live on the South Side, and a damn cab ride costs an arm and a leg from the Highland Park area...
Extra star for having a freaking dinosaur greet you when you get off the tram. Our little one loves that thing; we have to go pay homage every time we fly in or out of PGH! Drop a few bucks in the hopper - it's for a good cause (the Carnegie museums...)