I dont know anything about the Jewel, but we did Navigator last trip and loved it. There were a ton of people on board (New Years cruise, more kids than adults) but never really noticed it since its so big! Theres a lot to do-pools (too cold for many), rock wall, inline skating, ice skating, arcade, different restaurants, mini golf, basketball tournies, etc. Our son was only 2 so I cant comment on the kids club. He had fun exploring and people watching!