I'm up to three now.
The first one is a great shooter. It put five different loads into 4" or less at 25 yards: 115gr, 124gr, and 147gr Speer Lawman, 124gr +P Gold Dot, and 147gr Federal HST. That's the gun the sear deactivation lever fell out of. Smith sent me a new lever and pin. They didn't ask me to send the gun in.
Encouraged by the accuracy reports on this forum and the results from my own gun, I picked up two more 4.25" M&P 2.0 9mm's. Both have issues.
One shoots 124+P God Dot, 147gr HST, and 147gr Lawman FMJ well enough. Each of those loads will do 4" at 25 yards, but it's not as tight as the first gun with the JHP rounds. I couldn't get any of the other loads to print under 6" (115gr and 124gr Lawman). I may try some other loads to see if there's any other practice ammo it likes.
The third gun had three failures to eject in the fist 50 rounds. An empty case stayed in the chamber and a live round tried to feed behind the empty case. Two of the failures were with 124gr +P Gold Dot and one was with 147 HST. That gun couldn't put any of the loads mentioned above into less than 6" at 25 yards. It's on its way back to Smith. We'll see what they do with it.
Same old crap, different day. It's so dissapointing. I consistently shoot M&P's better than any other gun, but there's a good chance I'll need to put an Apex barrel in them to get any kind of consistent accuracy among multiple guns.