The food was quite good, particularly the chef's suggestions, service was outstanding, and enjoyed activities such as the Flowrider, rock climbing, the theater, pools/hot tubs, etc. Watching the sunsets in the Cosmopolitan Club on the 14th deck was a special treat. Ports, however, left something to be desired.
First port at Falmouth was disappointing. Royal Caribbean built a harbor there to dock their ships so Falmouth is "artificial" and basically an outlet mall. Iron gates separate the shopping area from the town, and it's easy to see why. Falmouth is not much better than a 3rd world slum, if you venture there. Have to take some excursion to get away from Falmouth and see at least some of the "real" Jamaica. Grand Cayman was much more accommodating, in part because we took a very enjoyable excursion to Sting Ray City and snorkeling. But the island seemed to be a step or two up from Jamaica. Last port at Cozumel was sort of a cross between Port Aransas, TX and Nuevo Laredo--lots of Mexican tourist trinkets to buy, "party bars" for spring breakers, the ubiquitous high-end jewelry and watch stores (present on all three islands), which were interspersed with local bars, many featuring Tequila tastings. You have to wonder if the jewelry is really the bargain that not only the stores advertise as such, but also the cruise ship itself. Again, you have to get off the main drag in Cozumel--renting a motor scooter lis one option. Another is to visit the Mayan ruins--Tulum can be done in 4-5 hours. Unfortunately, the major Mayan ruin, Chichen Itza, is a good 4 hours by bus each way, leaving very little time to explore the ruins (guide books recommend at least 4 hours) and return to the ship on time.
One major disappointment was I told RCCL my wife and I were celebrating our 50th anniversary and two of our grandchildren (28 and 23) were celebrating their birthday during the cruise. The only thing RCCL did was to give my wife and I and our two grandchildren one of the small, finger desserts (with one candle--that's about all that would fit) from the luncheon buffet at the Windjammer.
Cabin was fine, clean and well-appointed. Only disappointment was we had an aft corner cabin on Celebrity and and it was airy and located right at the aft with no obstructions. On the Navigator, our aft cabin had a semi-circular part of the ship outside, enclosing all the cabins, plus part of the ship's superstructure enclosed that, essentially seriously detracting from the pleasure of an aft cabin. Bottom line--no more aft cabins on RCCL.