Repeating what Don said. The black and white aspect of it looks really good. The framing of your model in the picture needs work. A little bit more lighting of her face.
I also wonder if a softening of the model, in Photoshop a Gaussian Blur, might improve the photo as the image is sharp - lol which is so many times what we are striving for.
Did a little cropping down to put her eyes in a more pleasing position IMO and got rid of all that dead space. As for the chopping of arms... I couldn't do anything with that. I also applied a slight softening (Gaussian Blur) to the photo and lightened it a bit for the face but the brightness to the side is quite a bit brighter.
