I am starting this thread because my original thread was 'closed'. Having owned several Glocks for over 20 years I consider myself a 'Glock Guy', as they are my pistols of choice. As stated in my previous thread my department is transitioning from Sig P226 DAK 40's to M&P 45 4.0" Bbl. I recently transitioned to the new gun and posted my initial impressions here. After carrying the M&P for weeks now I can say that it has grown on me immensely. I really like this gun, and it's now my 1st choice CCW when off-duty (for several reasons). As previously posted it's approximately the same size as a G23 so it lends nicely for CCW. P.S.: Not trying to start any wars here; like I said I'm a Glock Guy, but this M&P does fill a void in the Glock lineup (dbl stack 45 4" Bbl).