Up until recently I carried one often. My PF9 failed to be a fun gun at the range. But that was it's only failure ever. Ran 100% with any ammo it's ever seen. Light, affordable, concealable, reliable. Not so hot trigger and shooting it feels like a firecracker has gone off in your hands.
My PF9 has been replaced by a S&W Shield for carry. But I'm keeping the PF9 for now. I have confidence in it, and it's only worth what, $250 used?
"The Future is Unwritten"