Very interesting movie from the Jim Henson Company. If you like fantasy stuff - think Labyrinth, Dark Crystal (both also Jim Henson Co.), Legend, Tim Burton's stuff, etc... You'll probably like this dark, bizzare story. The theme is fairly typical for this sort of story, but it is the odd characters, unique style and great visuals that make it interesting.
It had a surprising amount of LFE at times and very well done surround. There was at least one surround bit in particular, when one character skips a stone on the water toward the viewer from center to right rear that was very cool.
Overall, the story is a bit lacking, but visually and soundwise it is worth a rental.