I have not shot that particular model but the USP45 I shot did not strike me as being more than a $750 gun. It felt very "different" than most other duty-type guns. Not better or worse. Just different.
IMHO handgun for more than $850 needs to be more than a basic service pistol. It just depends on what you want really.
Also, H&K makes good products but will not sell the majority of their most desired items to the public. If they do offer a variant of it, they are very modified and goofy-looking versions of the ones people really want to buy. They do not seem to really care or even like the civilian market. This is another (and unrelated) issue that I dislike H&K.
Sic Semper Tyrannis