It's pretty nice, but you should really add some stronger highlights to the metal. It'll make it more 3d-ish. In addition you should also put some shadows(and hightlights) on the red parts. I'm not sure wether they're supposed to be some sort of plate or light? Anyway, looking good, keep up the good work sir.
Also, for the torso i'd suggest doing something like you've done with the back of the thighs but with stronger shadows, that would look pretty nice.