Issues
I feel the proportions are off, most females tend to have much more of a tapering at the waist, unless this person is pre-pubescent or just not an average female.
The other things that bother me, is the fact that as the eye travels down the amount of effort seems to dwindle, this makes me think you worked from up to down.
The leg positionings seem off, her right leg should be more solid, because there is no weight being held by either leg.
Her ankle is also contorted in an odd fashion, both feet are positioned weird. It's very nice despite the mentioned issues.