Lapti Nek is a bit hokey, and the puppet Sy Snootles is not very believable. It's one of ROTJ's weaker moments.
But I appreciate that Lapti Nek is not Jedi Rocks. The new CGI in the sequence does not fit the rest of the movie. The song is over the top and goes on too long. And the killer combo of shaking uvula and flying spit is the biggest reason that the SE of ROTJ is absolutely forbidden in my house.