I really don't understand all of the negative reviews.
I flew from LAX to Charlotte, NC, then to Punta Cana, Dominican Republic. All four of my flights were on time. Every flight attendant was very sweet. The flights had some turbulence, but that's to be expected because of weather.
Granted, I flew first class, and perhaps my experience is different than someone in coach. My seat was roomy and comfortable. The drinks were abundant. I would definitely fly US Airways again.