I think it is a good start, but it is looking a little dark to me. I assume this is the night skin since you have a lighter one, but at the same time the darker screen doesn't have the "life" as does the light screen. I would like to suggest changing the gradient on the buttons so that the light is on the top, and angle it. The way it is currently is "unnatural" to the human eye, because most things are lit from on top, not from the bottom. I would also suggest either getting rid of the dark, black outlines on the buttons, or substituting it with thinner, white outlines. That should help brighten up the skin much more, and make the buttons "pop". I like the grey background though, and how it's subtley different. I also like the layout and positioning of the screens. Good start!