an amazing image! beautiful and very fluid. for manipulation it would be easier if there were a more distinct line between her front and the background, but for beauty and artistic qualities it is wonderful how it is delineated. her left hand could be more in line, but i do not think it is a really bad thing, just a tiny thing!
overall, i have seen this image a many times now, and you achieved the ultimate goal in any piece of art, i keep coming back to look because it has my interest and appreciation. i want to look at every detail! the overall is stunning, the details are wonderful! putting it on the diagonal helps guide the viewers eye and the curve of her arch is the golden ratio.