Really nice capture. I like the lighting and pose in the shot. The only thing which I would change is the background... I would go ahead and fully burn it out to black to put the full attention on her. But... that's subjective of course
Looks really nice. The dramatic light you used creates depth and textures really well The one thing I'm not sure about is the background. On my monitor there is something visible there....can't really say what that is, but I think it would be better if it was more visible or just plain black.
Often I find myself lazy, and hate to process different versions for different output since I don't use Lightroom. Sure, I can put background at RGB 0,0,0 and it looks great on screen. However, it will look like a piece of crap when it gets printed. This image has tons of flaws and took me a little while to get it acceptable in post.