I kinda like it. It feels bigger than it really is. I like the grip safety. Also the heavier trigger isn't a bad thing on such a small carry gun, though I'm less accurate with it than with lighter triggers. But it's much more accurate than a .380 Bodyguard! I'm leaning towards getting one and probably dumping the 380. It's just too small to use easily, especially under stress.
I think the XDS is a pretty capable little 9mm. I have the XD subcompact and love it, but it can get a little heavy when carried all day.