I would give the cruise a 5 star rating, but the last day at sea was really chaotic. They had definitely not enough deck chairs to accommodate all the people. Or they had enough chairs but some people reserved them, who knows. However never saw this on a another cruise, people were laying on the floor on deck 10 only with a towel, later the crew handed out some cushions. Looked like a boat of refuges. Last year we did the Panama Canal with the Legend and they had tons of deck chairs, don't know why the Rhapsody could not get any more of those.
On a positive note, I can definitely recommend the shore excursions RCCL offers on the trip, very well organized and very informative. I know some people like to organize something on their own but you will really miss something. Took excursions in every port, except Santorini. Regarding Santorini, take the cable car uphill and walk downhill yourself it's an 35 Min. walk steps downhill; wear sneakers.
Not as large as expected; sometimes a bit noisy you may hear the engine at night. Maybe a problem for some at the first night but really not a big deal.