Got an M9 for my wife about a month ago... I has been flawless, although the striker is somewhat tighter than advertised... Over 10 lbs, vs 6 lbs.
Although the 357 sig looks very nice, I am waiting on the S series... I like the idea of the compact, and would do a 40/357sig for me, but the 9 was perfect for the wife...
Absolutely no recoil, or muzzle flip due to the low bore, and the grip was a great fit for her small hands, compared to the Glocks she tried.
We got the LE version that uses a handcuff key rather than the standard 2 prong style, which I prefer... If we lose the key, chances are finding a handcuff key will be much easier than a proprietary style.
I did post a range report here, I think it got moved to the Lock and Load forum... Search my username for it...
Enjoy!