I have owned and carried a PM9 for years. I got the PM9 before the CM9 came out. The PM9 dovetailed sights allowed for night sights that I prefer.
I had reliabilty problems with 7 round mags but none at all with any of 6 round mags I have.
I continue to find the PM9 an ideal carry gun. Small and light easily carried in a DeSantis Fly pocket holster but powerful enough to get the job done.