well, i don't have the m&p, but i have several 1911's and have or have had multiple polymer guns such as the XD, Walther P99, Sig Pro, etc, and NOTHING carries as comfortably as a nice slim 1911, which IMO is about the nicest fullsize handgun to carry made. That's not to say I don't still carry a polymer at times if I'm expecting rough weather or circumstance where I don't want to beat up my 1911's or just because I feel like it, but the thickness generally equates to either a bit less easy to conceal or less comfort, depending on the holster.