It's my favorite polymer pistol. I have two in 9 mm w/o internal safeties/locks. The multiple grip panels are nice; therefore the ergos are great. The trigger is nice and I am very quick and accurate with the pistol. Felt recoil is oddly low. Single shots don't seem to make much of a difference compared to other polymer pistols, but rapid shots are noticeably less snappy which means there is less TOT (i.e., "time off target") which is a good thing.
Trigger reset, while not as short as a Glock is very nice as is the trigger pull. I've no issue with overtravel as some magazines have reported. There are modifications that can be made to the sear to reduce the over travel. There exists a .pdf file with all of the instructions or simply pay $50 to have it done.
M&P parts are now offered in Brownells and they are very inexpensive.
My only disappointment is the magazine follower:barrel feedramp interface. The rounds really CRASH into the feedramp - and I'm speaking about Winchester Whitebox ball ammo. It always feeds the rounds - including all hollowpoints, but it really shouldn't do this. I can insert a full mag and slowly release the slide and it will hangup - the nose of the round will be impacting the feedramp. If I drop the slide on a full mag there will be two distinct (both audible and vibration) impacts. My 1911s, P2000, USP, P226s and/or P7 don't do this.
That said there is an updated follower - gray in color - and can be found with the compact version of these pistols. They place the cartridge in a more "nose up" position and it sits about 0.2 inches higher -- until one loads 7 or 8 rounds or more into the pistol and then the top round will sit like it does with the black (version I) mag followers (i.e., just about parallel with the floorplate).
Again, this doesn't appear to harm the function of the pistol, but it's directionally very wrong. The cartridge should be placed such that the impact of the feedramp is relatively insignificant. The P2000 appears to be best in this regard for 9mm pistols and gives me much confidence for feeding any type of 9 mm ammo.
Solution: There are relief cuts in the mag housing and follower. The reliefs need to be reduced in dimension to avoid the follower tilting forward. Ideally, the follower should place the cartridge as high as possible and as steep as possible without having the extractor have issues with the rim. Perhaps it is. If so, it's an oversight as feeding/extracting are the most important aspects of a self-defense pistol.
Overall Rating:
Design:A+ Awesome ergos and perceived recoil reduction; contained fire group which includes the frame rails.
Execution: B+ (front sight loose on one, replaced slide; new barrel & followers for the feed "concern" - it didn't effect shooting)
Company Service: A+
Accuracy: A+ Similar, but not quite the equal to my P226 using same ammo.
Intangibles: Conceived, designed, developed, manufactured and assembled in the United States of America.
Anyone interested in a P226?