Not bad, ribcage looks a tad bigger than normal in comparison with the hips and breast placement - then again I'm at a work computer, and the resolution is jacked to all shit.
I like it though, looks really good, especially the detail to the face. I also like the light reflecting off the intestinal binding (right above the naval and near the underside of the wrist as it wraps around). I can't comment on the schlong, counting I've never seen one "naturally sheathed" in person before.
I do wonder what it looks like in person though; camera's can hide the details in paintings very easily. Can you by chance tell us the dimensions of the painting?