I purchased a 12. gauge M2 and am absolutely delighted. I have shot it over a thousand times and have had no problems whatsoever. It's a comfortable gun to shoot, and 200 shots with no shoulder padding did not result in any bruising to my shoulder.
I liked it so much I bought the .20 gauge version as well, and I have shot skeet, hunted pheasant, dove, and quail with it. It's my favorite gun to carry.
These two are my favorite guns to shoot by far.