We did back-to-back Eastern/Western Caribbean on the Silhouette. There were over 100 others who also did back-to-back. The ship is gorgeous, as are all the Solstice-class Celebrity ships. Very spacious, modern and tasteful.
The food was excellent overall. The buffet area is spacious, with the food islands far enough apart that you aren't tripping over people (unlike the newer Princess ships). The Grand Cuvee dining room is lovely, with the signature huge glitzy winerack as its centerpiece. Service in the dining room was just ok. It seemed like the waiters/assitant waiters needed more training(but that did not affect our enjoyment of the meals). We did not pay extra for the specialty restaurants as we enjoy the main dining room a lot.
We had an inside cabin on the first week, which was quite spacious and well-equipped. The outlet in the bathroom can only be used for a razor, not the hairdryer or a curing iron. The bathroom light dims but does not go out completely. This is a nice feature in the middle of the night. There also was a nightlight available in the cabin. The only thing I did not like about this cabin was that the end wall (where the window would be) has nothing on it, no picture, no mirror. It just looks starkly empty. The cabin did have a nice couch and small table, and the bed has a rounded end, which was fine for me but tall people might find it too short. The additional storage space over the bed helped a lot as the closet is pretty small and there aren't a lot of drawers or shelves.
We switched cabins the second week to an oceanview (this was preplanned and in no way reflects a deficiency in the inside cabin the first week). The crew was wonderful in transferring our belongings. We put our "loose" clothing and toiletries into our suitcases but left the hanging clothes in the closet. As we were going through the obligatory "leave the ship, waive your passport at the customs officials, return to the ship" routine, the crew moved all our belongings from our old cabin to our new cabin and hung the clothes in the closet. They even moved our Captain's Club flowers.
We had been to all the ports, except Coco Cay, several times on previous cruises, so we did not do a lot of shore excursions. We did snorkel in Cozumel, with a private guide (6 total in the boat). It was great!
RCL has a new cruise terminal in Falmouth, Jamaica. There are quite a few shops there, the usual jewelry stores and souvenir shops. We did not leave the designated area as we've had unpleasant experiences in Jamaica on previous cruises. It is a nice facility, but is incomplete and the prices were pretty high compared to St. Maarten, Grand Cayman and St. Thomas (our favorite place for jewelry).
Coco Cay was by far the nicest cruiseline private island we have been to. The barbecue was excellent, more than just the hamburgers and hot dogs other cruiselines provide. The beach was beautifully kept, and there were plenty of lounges for sunbathing. Prices in the market were pretty high, so we didn't do much shopping. You do go through security before leaving the island, which helps eliminate the backup when you get back on the ship.
The Elite Lounge and Elite breakfast were excellent, as usual. We thoroughly enjoyed our 2 weeks on the Silhouette.