Very good! I like the use of the backlight and the contrast of the shoes. Her jewelry stands out as well. She is a beautiful woman. If this picture was edited (Photoshop), I cannot tell it. My guess is that you may have edited the back round, but not her. That pleases me, as I think to many people rely on editing. This is a very clean photo. It is my opinion (and it is just that, so I hope not to offend) that showing more of her body would have been a distraction in this picture.
A covered act.... very beautiful. So what could be better? Maybe the cut, a small bit more place on the right side, to place her a bit more to the "golden cut". Other thoughts ... hmm, difficult to tell other things to improve the picture. As whytlion wrote, light is very good, the softness pleases this beautiful woman. I can look at this picture, but I cannot find out any more to improve - only the cut ... it is nearly perfect. To give a bit more room on the right side, this is the only thing I would expect to improve the picture. From the size, this would take 10 to 15% more space on the right side, not more. I like the "golden cut", but I like this picture, as it is. So just as an idea, a bit more space to get this golden cut ... Overall very well done