I'm generally a fan of HK products (but not their prices) and I feel that the USP was a fairly innovative pistol (well, they did steal the de-cocking frame mounted safety from Taurus). I've always loved German cars, German engineering, German beer, German autopistols, German women... er, anyway, I digress.
However (and not trying to crap in the thread), I was issued the USP for three or four years before my employer went in a different direction; both as an agency instructor and a user, I found fault with the pistol as a law enforcement pistol.
Props for durability and reliability (and the V1 operating system is one I like) but the cons are a mediocre trigger, average accuracy, the cheesegrater frontstrap and ergonomics that favor only males with size large hands or above. As one of our armorers used to say, the best $400 pistol on the market, that sells for $800 (then).
Out of pure sentimentality, I of course purchased one.