Edges... EDGES... also, the face needs to be cleaned up. If you are going to put this kinda time into a costume... take the time to clean up the rest of her... add hair... clean up the eyes... make it beautiful... This one is cool... with a little work it could be FANTASTIC!
The overall manip is great..but I think the pic would have looked better if you put her against a sky background and lost the drop shadow. With the way her hair and cape are flowing and the position of her body you could have made her look like she was in flight.