I have to say that overall, in the years I've been flying US Air, it's been a pleasant experience. Sure, they may charge you for bags and they may not be as fun and hip as Southwest, but I've had far more issues with canceled and delayed flights without any updates on the few times I've flown SW than the millions of times I've flown US Air. Delays and cancellations have been next to nothing, and when they happen, I've been very well accommodated for my troubles.