My post above focused on the negative while omitting the positive. I have two full size M&P 9's, one with and the other without a thumb safety, that run. While I love the reliability and accuracy of the HK, and the reliability and simplicity of the Gen 3 Glock 9's, on the timer, I shoot the M&P better than either the Glock or HK. With Apex trigger parts, the recent production changes by Smith and a Barsto/Apex barrel, they will be the closest thing to a plastic 1911.