I've had mine for about a month now. It functioned flawlessly when box-new through about 50 rounds and 4 different shooters. The trigger pull was heavy, and not very smooth. I have been exercising the trigger regularly all month - dry-firing with snap caps about 150 times every couple or three days. The pull is vastly improved in smoothness, and my ability to minimize muzzle movement through trigger pull is much better.
The second time to fire it was today out at the ranch, with about 55 rounds of mid-priced ball, and a few hollow point SD rounds. I traded off between it and my Sig 232 through the same number and types of ammo. I plinked at 3 empty soda cans set at ranges from 7 to 20 yards. The BG was hitting about 40% of the shots out to 15 yards, while the Sig's longer sight radius was walking the cans nicely out to over 25 yards. The 232 performed with 100% reliability. The BG .380 had one light strike near the end of the session, but went bang with the second cycle. I think I was not pulling cleanly through full travel. No feed or eject problems, and the slide locked back every time when empty.
Even though the Sig is a really sweet weapon, it is heavy and not a true pocket gun. That's what the M&P BG was purchased for, and it has few peers. It is not likely to be needed over about 10-15 yards, but I think what it could use is some paint on the sights for quicker aim. The post is a little hard to pick out against the rear horns.