The 4" models look really nice. If I wasn't already satisfied with my single-stack 9mm carry piece, I'd be buying one of them. I've shot the short barreled version and they are very accurate for what they are (a subcompact gun), and I've handled but not shot the 4" version. It's a great feeling gun, and I love the additional sight radius. In my opinion, it would a great concealed carry IWB gun because it would also be a gun that you would have fun practicing with.
If its is accurate, fun at the range, and small enough for concealed carry, that's a win on all fronts.