As someone who travels at least 3~4 times per year, I have gone to this airport quite a bit. I really do like it, despite it being kinda ...old. It definitely needs a facelift or something. Architecturally, it's still kinda 70s ish maybe(?) and almost sort of minimalist but also kinda grungy looking and dirty. I know airports aren't usually targeted as "glam" spots but still....they could scrub the floors every so often. The bathrooms are hit or miss in terms of cleanliness.
The best part of this airport is that it's not really confusing to get around (in my opinion, as a former Pittsburgh resident) and there are decent places to eat and shop, although I am bummed about them not having Victoria's Secret anymore. They get points for Godiva though. My mom likes going to the Nine West and Clinique stores too. They also have a Swatch store if you like watches or just killing time chatting with the dudes who work there.
Also they have Auntie Ann's which is instawin in my BF's book.