As an M&P owner, congratulations! S&W got this platform right. Nice addition. Have you explored the grips? Or found the right combo?
As a lefty with large hands, being able to change to the Med. grip, and swap the mag release to the "other" side, plus the grip is what sold me, makes the M&P a great package. And not as ugly as a Glock or XD....

Damn thing shoots everything.
Good get.