I really like the mixes and transitions between instruments at the beginning of the track.
The voice is a little unecessary, and could be removed entirely if you wanted to make it more ambient. That being said, it does add a nice twist to the music that makes it totally different from an ambient piece.
The drums at 2:08 come in a little suddenly, but sound really good.
Overall, I think it gets a little repetitive, but that's mainly because I have trouble hearing voices in songs. A wonderful listen.