We were on the Star Princess March 03 and just got back from the Caribbean Princess. I really didn't notice any additional crowding at all. We had no problem in the buffet, tenders or shows. On any of these ships, we've found the shows fill up fast. Until I told my wife, she didn't even realize there was an additional deck. Personally, we really didn't care for the Club Fusion layout, they should have just named it "Confusion". We perferred the Vista Lounge layout on the Star. Overall the Caribbean Princess was great! I think the extra deck and 500 more people is a non issue.