I guess this is a bit of a delayed reply, but I felt this thread needed one.
Anyways, I have a Px4 9mm. I've shot roughly 4,000 rounds through it so far with 0 FTE/FTF. The recoil is noticeably less than most other 9mm pistols because of the barrrel rotating system. The magazine capacity (17, can get 20) is very nice. It's a bit hard to conceal if you were planning on that as it's a full size handgun. It's very accurate and the backstaip system makes it nice to tailor to your hand size.
It's a great pistol, especially for 500 bucks!