I'm not really a Sigger, but-
Wife and I each have an xTen. She has pretty small hands, it fits her very well, she can reach the trigger and all the controls without shifting her grip, and she is able to shoot it very well. Pretty amazing for a double stack 10mm to fit someone with such small hands.
I got one first, she liked it so much I figured I'd better get her one too, or lose mine.
Shoots great, I *am* leery about the propensity for the P320s to fire when dropped, there is a lot of documentation that they do, so there's that.
Additionally, they totally blew it on the magazine design. Many wide, flat nose bullets (like one would use for bear defense) bind up in the magazine. the corners of the wide noses rub the corners of the magazine. Even Sig's *own* "Sig Elite" 180gr JHPs give trouble, because of the wide hollow point.
I load my own, so seating the bullets .010" or so deeper solves the problem, but if you're going strictly factory ammo, you'll have to choose (and test) your ammo carefully.
The gun is a bit under-sprung for heavy (real 10mm) loads with the stock 18.5 lb captured recoil spring. I found that the steel guide rod Sig puts in the X-Five and Legion series guns, which utilizes 1911 springs- works just fine (even though Sig says it absolutely will not)
I've got it running well with a 20# or 22# spring, cant decide which I like better.