USAir is the only airline I've flown. (At least during my adult years - don't know what I flew as a kid to Disney.) Here in southeast PA, they are one of the major carriers.
Knock on wood, it's been okay. I used to take them back and forth between Allentown and Boston when I was in grad school. Then we've used them to go to Disney, and I used them to go to Manchester, England. We'll be flying USAir in less than two weeks to go back to Disney, then I'll be using them in August to go to England again.
I think ALL airlines have problems. Truly. I don't see USAir being any different than all the others. And since we booked our tickets all the way back in December, we won't be paying the checked baggage fee on our upcoming trip.
(I'm knocking on wood some more now, to try and prevent jinxing myself!)