The first 1:30 of the song really does a good job at setting the mood for the song. It really sets you up for the rest of the song as well, as the mood changes ever so slightly. I noticed that you stick to the same mood till the very end of the song, and that does get a bit dull. Great job however.

I like it :D It does a good job of being something that was interesting to listen to but not distracting. The far off, distant drums were something that I think stood out by how far out of the way they were. It was a calming experience; I could see it being used in a movie/game where someone is sneaking around/into an high security office building. I didn't give you a 5 because there was a part around 3 minutes in where I feel like you could have changed things up just a little bit for just a little variation, even though it's a "mood setting" piece. Very nicely done either way though