Buy it!
Yes. I'm a pretty good shot, rested anyway. (I'm always working on doing better with the offhand). With good loads in my S&W 686 or my Ruger MK IV, I can do 1 inch groups. With all my other handguns, around 2 inches.
But with all of the 40's I had (3 full-size and one PC Shield) I was only able to group 3 1/2" to 4 1/2". And I tried a lot of different loads.
I had Apex trigger parts on some, the triggers needed work. But I didn't try the aftermarket barrel route.
This new 5 inch MP9 can group 2 inches with just about everything I've tried through it. A few loads even better.
I was a big .40 guy for years ( and .45 ACP) until I decided to try this 5 inch FDE in 9mm. I still have a couple .45's but am glad I got the 9mm.
I bought an M&P .40 5" with a thumb safety, and I LOVE this gun, I love the factory trigger, I love the short trigger reset, I love the checkering, wear gloves, and I love having 15 rounds of .40 S&W..
Yes the damn thing is hard to shoot accurately, it did NOT like Federal at all, (your milage may vary), it loves 165 and 180 gr., I have gravitated to the 165 gr. Winchester white box, shoot it, shoot it a lot, I've been ruined by lots of old Smith and Wesson revolvers and decent 1911's with awesome triggers......
But, and this is a big but, the M&P .40 5" is a natural battery of arms for the 1911 operator, I am very, very, comfortable with the manual of arms for this weapon, buy the 5", buy the .40, (don't wimp out with the 9 mm) come on, and buy the thumb safety.....
and shoot the hell out of it, it will give up being a diva soon enough, but shoot it a LOT! you're gonna love it, I promise or I will buy it from you if you don't!
you could change the trigger, some people do, but I wouldn't, I like the trigger, and yes, for some strange reason, this thing takes some shooting to get the kind of groups you want... I think it the sights, I'd love to have a set of black Novak's on it, but the sights may be a little tough to change... from hearsay???
buy it, its lovely, and a lot more weapon than those little pea shooter's, I wish it came in 10mm....