I have not shot an M&P, but I have a Sigma in 40. I have a complaint with Glock and their trigger guard, that I do not have with the Sigma. I am not bashing the Glock, but it is not the one I would have.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)