We did an extensive T&E when we went to the M&P in 2008, it pretty much tied with the glock in our evaluations..since we already carried smith & wesson 4566's the M&P is what we went with. after 3 years we were looking for a new pistol. We had problems of the slide not locking back when empty, internal springs breaking, ambi slide release lever was easy to hit with support hand..which caused the sliver to tear off the slide starting at the slide stop notch on one pistol. I guess we just kinda lost faith in them. There are a few officers who wanted to keep them but for the most part we were ready to move on.