Got a new PX4 SD two months ago. Overall I'm happy with it after swapping out the decocker levers, dropping in a 10lb hammer spring and putting on Talon grip tape. Recoil impulse took some getting used to due to the rotating barrel design inducing a bit of counterclockwise twist. Talon grips definitely help since there's not much grip stippling. My 9mm PX4 compact doesn't give that same recoil twist.