Very good picture indeed James
It does seem a little grainy and the clean up didn't go as well in the area of her back where there is a bit to much of a "halo" or band visible.
Also on the top right it looks like the background have better sharp focusing than the rest of the image,including the subject/model. In this case it draws the attention away from the eyes and model for me.
It's still gets my vote as it is a really good picture that work somehow for me.