I finished it. Loved the first set of puzzles and the plot twist in the middle. The second half felt more average over all though. I think I still like the 3rd one better.
Spoiler:I was not surprised at all the Le Chuck turned out to be evil. Also, I don't think that the Voodoo Lady is evil.
I also believe Morgan is still alive (where is the body!) and that Guybrush will be brought back with the power of the pox hand.