Excellently done. The texturing on the suit is wonderful and your use of light to establish the material is well studied.
The lack of a philtrum on the face is a little bit distracting from the overall image slightly. I don't know if you tried to do that with the piece originally and it wasn't working out but having the little ridge between nose and mouth would amp up the realism on this. If you weren't going for that, then feel free to ignore this part of the critique.
Love the hairstyle you have on her. The sentinel in the back really sets the piece off as well. Overall, excellent bit of art you've done here.