Good composition. Nice black hair and the high lights in the upper part of the stairs are pretty good - I would have prefered whiter in this area is oyu could maintain the black in the hair. Playing with the curves might achieve this. But one of favorites so far.
Excellent contrast! I wonder if the shot might not benefit from a bit tighter crop on the bottom of the frame, even though you would lose some of the roundness of the staircase.
The tonal range in this photograph is excellent, and the perspective is one of the strongest I've seen for this challenge. The contrast between the girl at the foot of the steps, and hardness of the metal, is perfect as well. Composition isn't quite as great as the rest of the photograph, but I think it works well.