I don't like the way the lace is chopped off on the topmost curve. It is just too sudden of a stop. That being said... Perfect lighting, wonderful catchlights, and a very interesting curvy pose lend a lot of interest. :)
The more I look at this image, the more I like it.
The only gripe I really have is, especially with portraits, you are tending to over amp your whites, and your blacks are dipping into the abyss. Therefore, your 18% grey rule is lacking.
Well controlled B&W. Interesting addition to the portrait, but why? Maybe in a sorta haute couture way where you just do it because it's weird. I can go for that. 8
Wonderful composition, however I think the face is almost *too* white, I'd like to see a touch more detail around the fingertips, and around the facial features.