i'm not much help either, but i just wanted to ask you if you DO get it if you'd post a review. i've had my eye for quite some time as well. it's so cute in the picture, but i have bad luck with quality from UO.
I tried it on a couple of days ago and didn't like it. I'm tall (5'9") and so the med was short and the empire waist didn't hit me at the right spot...might look better on you if you don't have a long torso. The material was a silkyish thick knit.