When I first got my m&p 9c, I swore the sights were off because I was shooting down and left. I did some google searches and it turns out it was user error.
Knowing this, I corrected my trigger pull technique, which corrected the down part, leaving me shooting left at about 7" groupings.
After Joe's CCW class, I pulled the groupings in about 2 or 3 inches, so that I am grouping about 4" with it. It's still a bit left of center, 3" left, 1" right, but I'm getting there.
User error, practice, and instruction and they will both love it.