The shots are really too small to be able to effectively critique anything here. Overall composition looks good. In particular I think the scarring on her back and toosh are really well done, but again, it's tough to be sure. Bigger pics would probably net a bigger score.
You might need to play with your lights a bit (try different distances or angles), I have found I need to do that when I switch backgrounds out. Do you diffuse your lights by using a light cube or even just some tissue paper over them? If you don't you might also try that, might take care of the hot reflection spots on the pale skin areas and such. I like the colour contrast of the pale skin and rich reds on this.
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