PIT, while much more quiet than it was say 12 years ago when US Airways was soaring, is still a good, clean and efficient airport. The spoke design, as others have mentioned, makes it a very fair place to make your originating flight or connection. The only real negative I can see is the free wifi service. I could not achieve a decent signal anywhere in "the spokes," so I dropped by a small cellular phone store in the sky mall area. They informed me that service is poor throughout the airport, and that I should set up shop near McDonalds for best results. They were right.