Lighting is good and the textures are nice. It feels a little bit less than sharp to me, I probably would have given it a 5-6. I'm not a big fan of the black background being used to isolate the flower, it feels unnatural and makes the mood borderline dark.
For me, the best part of this is the edges of the green leaves & the detail in the bottom left of the flower. The light against dark is always eye-catching. Nice, plain & simple presentation.