dark is good - there appears to a few rendering artefacts around some edges but that is the only thing that spoils it for me - otherwise - an excellent piece.
I agree with Phil. I love the image, simplicity, and how you accomplished the texture! The edges are a little rough and gives it a slight blur into the background.
Looks good. I love the textures. It looks a little dark on the left, but it looks intentional, so there must be a good reason for that. I personally like dark and simple desktops. Good idea. I like how you put it in a square, gives more to the image.