This song is really nice, if you've ever played FFIV. If you haven't, and therefore haven't actually fought the Calbrena, it loses a little bit of it's effect, but it's still a good song. To recap: The Calbrena was a creepy little doll thing that attacked you in the underground, and was accompanied by arguably the most disturbing music I've ever heard in a video game. This song was what originally sent me in search of SNES Music, and got me started on the long road that eventually led here.
Anyway, back to the review: Good song, I really liked the organ sounds and the intro, but I wish that the actual Calbrena theme was more pronounced and easier to understand and hear. A plain flute, without vibrato, would have been very nice, and would have cut through the background without overpowering it horribly. The flute that is currently in here is way too quiet.