I like the colors and the saturation. I think the cropping is just about right. Cropping it looser would cause you to lose your subject, cropping it tighter would eliminate too much scenerie.
Beautiful shot! It's a little blurry (probably due to the distance), but the colors and composition are very nice. It's a shame you couldn't have been higher above the glider too, resulting in a larger view of the kite, but overall a very nice job. (6)