US airways has uncomfortable seating, narrow aisles, and the staff have been unfriendly for the past 3-4 times I've flown with them.
There aren't any TVs so a 4 hour flight can feel like FOREVER. (If you're like me and forget to download movies for flights)
Their snacks are also really scarce and not worth it. I got the fruit & cheese plate on a 5 hour flight and it literally only came with a tiny bundle of grapes, no other fruits. Plus it looked old. When I flew with other airlines, they've been a little more generous than that.
I hate flights with US airways, I feel super uncomfortable the chairs aren't soft and I always feel really anxious when I'm flying with them. With other airlines, I feel more relaxed and like I can sleep well.