I don't have a USP but I do have a P2000 which is based off the USP Compact. Amazingly accurate, rugged, and well made pistol. The only people who dog HKs are those who either can't or won't spend the money for them.
I like HK's but that P2000 is nothing miraculous. It will die the same as any other high capacity polymer gun. Especially if it's a .40.
Dave