errr.. without sounding like a creep, i would have cropped a little lower. something distracts from the leg. the upper section is the best lit, tending to lead the eye there.
Nice composition. My eyes are drawn to her cleavage rather than to her legs though, since that's what is bright in the image, and where the lines flow. A different lighting arrangement could shift the emphasis. Still, an elegant, appealing shot.
IMHO showing only the feature is not good in this challenge, because I can't decide if indeed those legs are the defining feature or maybe something else. Other than that great image and great legs! Well done!