This Photo has an amazing amount of contrast, both deep blacks to pure white, as well as the virtually colorless to the brilliant color in her hair and eyes.
The focal point is well defined by the bright colors in her hair and eyes, and continue to draw the eyes back to a starting point there. I see movement as flowing from this point, down her thigh, up the body, down the other leg and returning via an implied line to her head, in a figure 8 manner. It really keeps the eye flowing through the whole composition.
The use of depth of field to focus in on the subject is great, but I would like to see just a little bit more, and maybe pull the right hand in focus, but not enough to pull the forward arm of the chair into focus. There also seems to be a little bit of detail lost in the right hand due to there not being quite enough contrast between that hand and the wall, and between the right arm of the chair and the wall. I would like to see that chair arm stand out a little more from the wall, maybe by adjusting the lighting to cast just a little more shadow on the wall there. Maybe use a little "burning" techniques in that area to achieve this.
Overall, the model fits the project well and is quite lovely, and you made wonderful choices in the composition that make it pop. You appear to have paid exacting detail to line in the main subject and made lots of wise choices in contrast and color to draw the eye. Wonderful piece.