IMHO, the design feature that the M&P has over the Glock and the XD is that you don't have to squeeze the trigger to take it down.
That whole trigger squeeze thing has always made me uneasy. I thankfully am very aware of my gunhandling, and clearing procedures, almost to the point of obsession, but I still don't trust a gun that makes it so easy to fail catastrophically if you're having a bad day.
As fot the indestructable reputation, I HAVE seen someone jack their glock up so incredibly that the slide wouldn.t even rack.... To this day I still cant figure that one out. But like my buddy standing next to me said to the guy: "congratulations man, you broke an unbreakable gun."