I feel like what this piece exceeds at is finding instruments that sounds good alone, but fitting them perfectly with the other instruments to create an absolutely beautiful texture.
My only criticism is a bit of the background clicking at ~1:35 (perhaps percussion?), which feel a bit too hard, in that they break the silky texture. Despite the fact that they're very quiet, such a texture makes me focus more on the smaller details. ~3:05 however makes this clicking kind of sound work however, so perhaps the instrument is too quiet?
Anyways, awesome work!