EDIT: Thanks, Crossword
I thought the first half was lackluster (as funny as it was why did Toei recycle Brook's "romantic" filler?), although stepping over the frozen Kinemon was amusing. Oh, and Smiley's awesome.
Second half was a lot better, though mostly due to two factors….
a) Caesar's monologuing....Nakao just keeps getting better and better, and talking out loud to no one just makes him seem even more insane. I know I'll love every following Caesar scene from this point
b) Luffy's entrance at the end! Great animation (plus Law's wtf face and Chopper's face, though I think Robin looked very off in that scene)