Very nice banana still life; the background is very effective. To my eye, I think it would have been better with 3 bananas - that is kind of nitpicking but I keep wanting to see another banana there! I guess it's like gardening, you always plant in groups of three so it will be soothing to the eye.
The composition is simple; a bit too simple, perhaps? I'm a bit bored by it. Maybe a few more bananas? The yellow has a distinct greenish cast for bananas that are this ripe.