It may be useful to keep in mind the following story, possibly apocryphal, when discussing Prospero's Books: a famous practitioner of Far Eastern music was being entertained in Europe and was taken to a concert featuring the music of a Baroque master. Afterwards he was asked how he enjoyed the music. He replied that it was nothing but childish drivel.
If you enjoy Shakespeare, "art", "film-making", music, dance, visual spectacle, and originality, then you will likely enjoy this film at some level. Although difficult to find, Noel Cobb's book Prospero's Island will add greatly to your enjoyment since it contains a very lucid explication of the psychology of The Tempest on which Prospero's Books is based. I wouldn't be surprised to learn that the director, Peter Greenaway, read this book as part of the preparation for this film.
I would also like to issue the following challenge: try to detect even one individual among the dozens of actors, extras and dancers in Prospero's Books who does not appear to be completely immersed in the creation of this remarkable film.