It's a very artistic and elegant film, heavily symbolically charged, very European in its presentation of sexuality, and with Peter Greenaway's predilection for morbidity, it can only be awesome. The music is by Nyman, as usual, and it adds a great deal to the film. It's pretty strong though, with elements of sadism, coprophagia and cannibalism. On the other hand, the way the food is displayed gives one a healthy appetite.
It is important to pay attention to the change of colours - blue, green, red, white. It could be argued that "blue", aka outside the restaurant in the parking lot, might represent Earth, the "green" inside the kitchen could be purgatory, the "red" in the restaurant might represent hell - there is also a reference to a famous painting at the dinner table - and the "white" in the ladies' room might represent heaven. It might take a couple of viewings to digest everything this movie has to offer.