the PPQ in 9mm is a gem. one of my favorites. up there with the P320 and G19. unfortunately the PPQ in 40 and 45 are snappy as hell, mostly due to the light slide. i have not yet shot the PPQ in 45 but my father had one (he's a PPQ fan boy). with the PPQ 45 he didn't like the recoil impulse. i've heard this same issue from many others. if you watch some youtube videos many of the people don't want to complain about recoil but just watch the pistol jump around in their hand.
look at the slide and frame weights on a PPQ vs. a glock. the PPQ has too much weight in the frame and too little weight in the slide. they're also undersprung in .40 and .45. the result is sharp recoil impulse. for this reason i have zero interest in the PPQ 45acp. as usual, your results may be different from mine.