I like it. I'm not a fan of using the thin-line background, partly because the left-side (the fade) is funky sometimes and really does make a minor difference.

I don't like how the button looks when you are on a particular page, but I think its just me because it works. I don't have too much to add for this one, its just nice - neat really.

Although, I can't help but think I've seen something that resembled this site before. Not saying its a possible rip, I just think it's been inspired. Perhaps the background?