The highly detailed and defined eyes and lips contrast greatly with the rest of the body and hair. The body and hair are much much softer, with much less definition. It really looks like the body was left incomplete, without its shading and contrast completed. The face seems much more refined just based on the skin shading and details. This also contrasts with the sharper and more defined background. The main torso itself looks almost slapped on after the head and arm were done. It seems to have been made to fit the positions of the two, resulting in a misshapen and disproportionate look.
Despite that, it's pretty good.