I should mention that I've dry fired this gun over the last three days, and the trigger is decent. DA is heavier than my Elite II and D but it is still very shootable. It's lighter than my Girsan. SA is light and crisp. Reset is a tad longer than my Elite II.
I've been using my Elite II Blade-Tech OWB holster as a gun bucket for the PX4 in dry fire. It doesn't click in, and just covers the trigger. I have a Blade-Tech PX4 holster coming and should be here next week. Blackhawk OWB mag holders work fine with the PX4 mags.