Sorry to ruin the poll guys... But when I first got my M&P it ejected every casing right back into my face... now its only about 1 for 10 so not so bad

and at least the gun always went bang...and well has never not fired. I have found I always have issues with new handguns... even my sig the slide wouldn't lock back on an empty magazine for the first 200 rounds...
However I did have an issue at first with the metal/plastic bottom piece that holds the palmswell grip in place. it would slowly come lose while shooting and fall out... lost it in the grass on the pistol range and got a new one, no problems since.