The PM9 is a pussycat compared to any of the six j-frames I have owned. I have put 150 rounds through mine in a range session, and a number of them were +p and +p+ rounds.
I carried my PM9 every day for 3 1/2 years, so will readily admit to a bias.
However, I did not get there in a vaccuum. I have owned a fair number of quality 9mm pistols, including Glocks, XDs, Rugers, HK P7s and EMPs (several of each). And a number of "lesser" pistols (are you listening, Kel-Tec fans?)
All of them are gone. The PM9 is still here. I no longer carry it regularly, but it's not going anywhere, because I'm not getting any younger...and I may one day revert to pocket carrying a small, lightweight, accurate, reliable 9mm.