I have the M&P9 and the M&P9c and love them both. The compact has become my carry/nightstand gun. I have three different holster for it and an XML rail light for it. The advantages of the M&P are, black stainless steel slide, Interchangeable back straps, loaded chamber indicator, high capacity, low felt recoil, excellent trigger, American made, S&W lifetime warranty.
Some will tell you it does not have a long track record yet but all it need is time for that, that complaint if kind of reaching the bottom of the barrel. True mags are not cheap for them but that too will change in time. Desantis already has a full line of holsters for both the M&P and the M&Pc from IWB and OWB to shoulder rigs. You can even get night sights for them.