Really great.
very good ambient music. It's chilled out enough that it can fade into the background, however it's also interesting enough that you can listen to it on it's own. Lots of different sounds and textures combine together cohesively. Even the lead sounds that stand out a bit sound like they belong.
nitpick: when things pan from left to right, that makes song a little bit more "active" then I felt it should have been. However, that also makes it more interesting and keeps it from being 1 dimensional. Also, the voice sample sounds like it sticks out a little bit too much. I wish it was a little bit quieter or had a little reverb on it; something to make it blend a little better.
However, those are just nitpicks. This is a great song that could have a variety of application in games or flash videos. 5/5