I have the Kahr PM9 and the Shield 9...love them both. I've not had one issue with my Kahr and have put hundreds of rounds through it, I would trust it with my life. I don't have as many rounds down range with my Shield, as it's still relatively new, but based upon my experience with my M&P's (3 other pistols) I don't anticipate any issues with the Shield. In my experience, the M&P line is spot on.

To each his or her own. You can't go wrong with either one, it's a matter of what feels good to you.

__________________
S&W Girl, for sure.