This song is simply amazing.  It starts out slow like Schala's theme, but then the fast paced drum loop kicks in at about 0:16 to give the song some life.  The change of the drum loop at 0:33 is somewhat sudden and could be done better, but it doesn't take away from the song.  When Schala's theme comes in at 0:45, it manages to be the main focus of the song without overpowering the other instruments.  The pauses/breaks/whatever in the drum loop are very well timed and make the song what it is.  The beginning part of Schala's theme at 2:35 is quiet, but noticable.  I actually didn't hear it until the 3rd or 4th time I listened to the song. 
Overall, this song took a huge creative risk, and it paid off big.  And for some reason, it reminds me a lot of the song at the beginning of Men In Black (which I haven't heard in years, so I have no idea what it sounds like any more).