I love this airport and compared to others, here is why:
1) it's spacious and well designed, bathrooms are everywhere and the halls are wide and have carpet so it's not too loud and easier on your feet.
2) there are plenty of places to eat and shop, it's like a small mall.
3) the layout is easy to navigate, you would have to work hard to get lost or turned around.
I've been to 16 airports this year and Pittsburgh has been my favorite.