Fwiw
I had one. Always thought the Sig 220 was a good gun, still do, have one now, but the USP is a different animal in my book, the softest shooting .45ACP I've ever shot.
Function was flawless, even after changing shape in a trailer fire, it still cycled. I sent it to H&K so they could see how it still cycled on the rails, and they sent me a new one! I'd call that pretty good "customer service". I wish I'd never felt the necessity to let it go, and I wish I had the opportunity to get another. If you can afford it, I would not say you can't miss, but I would say you'd miss out on some nice shooting if you didn't get one.