We enjoyed the dressing up for the Halloween party. It was so cool to see so many different costumes and ideas. Most of the halloween stuff was pretty understated. We couldn't seem to get our schedule set to go to the other events in a timely fashion. They also do a meet and greet with Jack Skellington and Sally after the movie. We didn't do that either.
I guess for our family of 3, we would not choose a cruise solely for the holiday extras, but they were an added benefit.