The reviewer below me already covered a lot of the things I was going to say. The strings would stop and start too quickly to sound realistic, you know? Which is okay, but the drums would keep going. So there's this weird contrast of artificial sounding string treatments and realistic drums, and I didn't know how to categorize what I was hearing.
Also, for some reason, the drums sounded a little off, rhythmically. Again, this might have to do with the strings.
However, the flute and the chimes sounded bloody great. And the part writing in general is phenomenal. I think if you tweak the attack on the strings, give them some reverb, etc - this piece will be a knockout.