I saw the movie last night, and I was very disappointed. It was ALRIGHT, nothing special though...and entirely too long.
I don't mind long movies, but when they feel long, you know they're no good. I went to Harry Potter a few days ago and the 2 1/2 hours felt like it went by quickly...a lot of action and things keeping me enthused - King Kong did no such thing. I felt it was dragging on even before they got to the island, and that feeling never changed.
3/10 for some pretty sweet scenes mixed in there.