I took Us Airways to Europe this summer I got a great fare ... but.
On the outbound flight both our flights where delayed and our connection in PHL was very very hectic (had to run to make it).
On the return again the first flight was delayed and the second flight was not only delayed but they also had to make a stop to refuel (the plane was to heavy to depart with a full fuel tank.) I ended up get in at 1 am instead of 9pm.
On top of everything only one of our suitcases made it the other we didn't get until the next day.