Finally fired my PX4 after having it for 9 months.
EXCELLENT! Super accuracy and consistent shot groups. I noticed they got better after a couple of magazines. Don't know if it was me, or just the barrel getting broken in.
It also seemed to have less felt recoil than my CZ-40P.
Plus the PX4 has a good, smooth trigger, and no grittyness, especially when firing SA. It had a gentle pull until you got to the sear, and then it released.
Overall, I am extremely pleased with this gun right out of the box.