I've got a FS model, and it does everything it's supposed to do pretty well. It's accurate, it's good training for my full size and Shields. I haven't had any issues with ammo, and mine is shot mostly suppressed with subsonic ammo. It eats everything I put in it with equal relish.
The only ding I'm gonna throw at it is the safety levers. They are plastic, and if you miss a reholster, it is possible to basically over rotate the lever (like more than 90 degrees). I know that this isn't a self defense oriented pistol, but metal safeties would be nice.
Other than that, it's a great pistol, if you're shooting M&P's and want a training gun, or if you just want a good plinker.
"Free men do not ask permission to bear arms"
Seen on Bumper Sticker:
I may be an old dog
But I can still bury a bone