Vignetting is too heavy (as others have mentioned). You must understand that vignetting largely works to focus the viewer's attention on the center of the frame, in this case where the lady's legs are.
I don't think exposure is spot on, as what someone mentioned earlier. I find it underexposed (possibly because of the vignetting?) and lacking a focal point. It is too tight but lacking focus right now. Shooting a bit wider will give your picture more breathing space, as well as a greater sense of environment.