I like the combination of whole and cut apples (and that you didn't chop that stem in half on the cut apple). Also a nice variety of colors, and you picked some good apples with no blemishes (did you clone out something on the red apple in the middle?). The leaves are a nice addition, but they look unnatural. The color looks a bit off overall, and the red apple in back looks a bit over saturated. A good photo for stock as far as setup and composition, just needs a little extra (or less in some cases) post processing to really polish it.