I had a PM40, it was a difficult gun for me to shoot, very snappy recoil, I traded it for a K40, IMO the K40 is just as easy to conceal and a much easier gun to shoot, I've now switched to a CW40, it's the best of both world for me, easy to shoot and it's lite weight makes it easy to carry
I had one for awhile, it's snappy, but I had a steel .357 mag that was worse. I found the PM to actually be easier to shoot one handed than two. It was relaible, and the only reason I got rid of it is that I went away from .40.