For years, I ignored this movie. I wish I'd continued to do so.
PROS: John Silver is handled okay. He's a sympathetic figure, but without losing his villainous menace. His little shapeshifting pet is only mildly annoying.
CONS: Jim Hawkins is dull. The other characters are dull. The 3D backgrounds clash with the 2D characters. The robot character is annoying. The story isn't engaging. I've never read Treasure Island, but I can safely say that the Muppets did it better--which makes sense. They had Tim Curry.