Really depends on how much you shoot in a day, age, etc. I don't wince a bit shooting 9mm loads from a 14 - 17 oz gun, even + P. But I wouldn't do enjoy 300- 500 rounds of it in a day, especially with a shooting hand that has carpal tunnel and a bit of arthritis.As I posted, my 14 year-old, 5'5" 125 pound grand-daughter has no trouble shooting a CPX-1, after the modification I made. If SHE has no issues with the 9mm in that package, I really have to wonder about the dedication of some posters.
FYI, as she wasn't an "accomplished" shooter, she learned the trigger quickly, and can fill the X-ring of a Shoot-N-C at 7-10 yards. She's certainly not Tod Jarret, but I sometimes wonder where the descriptions come from.
A fun gun should be something that you CAN shoot several hundred rounds without discomfort.