The model is pretty and though there are various areas of increased/decreased lighting, I don't really like where the lighting is hitting (fings and left of head). The bright sunlight forming the dot to the left side draws my eyes there (to a wood pole) first rather than to the model as the subject. There is also a bright dot on the head/hair rather than one near the face that would draw me to the subjects' face.
This is a great composition and a nice portrait but the lighting just needs to be adjusted a bit IMO.
I think this shot has great potential. Unfortunately, I think the only area that it's lacking is the lighting. I'd like to see more light on her face. As is, her skin tone pretty flat. Still a good shot!