For the last 20 years, US has NEVER placed a high priority on luggage arriving with the customers. It has always felt it more important to push the airplane off the gate, than pay much attention to the baggage. Especially thru PHL, arriving with your checked baggage is a gamble. As far as the company is concerned, it's just part of the cost of doing business there. I have never flown with my personal baggage checked. It's not worth the time and effort to wait days for it's arrival. If it doesnt fit in my carry on, I dont take it, even on trips to Europe. I can always find a place to wash my clothes if needed. Just my opinion, but most folks take way too much with them anyway.