Pretty good.
There are very few versions of the cave from yoshi's island, and this is the best version i can find anywhere, that i fond pleasing to my ears.
It captures the feel of the caves, their background mainly, the cool water running over strong formations of crystal, i would actualyl sit there and let the music just play.
I do however find that this song is in need of a better end, due to the abruptness, and this should be jmore easily loopable.
5/5 9/10