Part-time must have gotten a freak anomaly if the safety broke (if the HKPro and HK Forum forums are any indication). He does have a valid point about the grip being large--and if you're not LE, you don't even get the benefit of the 2 extra rounds that make the grip large (not without paying $100+ per mag).
I have a Fullsize, and have not had one FTF/FTE/Jam or any other malfunction of any kind. None. It has fed and fired everything from South African PMP to Federal American Eagle with the utmost style and grace. I am the limiting factor in this weapon system, and as I feed more rounds through it, I become less of one.
So there you go, if you can handle the size of the grip on the fullsize, go for it. You will never regret the purchase. If the grip is too large, you can try the 45 Compact--it may be the perfect fit.
As with any weapon purchase, try the weapon before you trade for it, or buy it.
My USP is the best handgun I have ever purchased, and the only one I will stake my life on.
"Great occasions do not make heroes or cowards; they simply unveil them to the eyes of men. Silently and imperceptibly, as we wake or sleep, we grow strong or weak; and at last some crisis shows what we have become."---Brook Foss Westcott