You are all in for treat if you haven't been on RCL's Radiance class. It's my favorite ship that they offer.
The Jewel of Seas is new and I think much nicer than the Voyager class mega ships which I have been on as well. She's a beautiful nautical looking ship. The bars served great drinks, the champagne bar and schooner bar are great. They have two self-leveling pool tables and we even played pool, they really do work.
If coffee is your thing, I have to have a good latte, they have a Seattle's Best area and when you buy six you get one free. Good deal for me since I like better coffee than the ship offers.
The Windjammer is set up nice with different food stations. I think the Seaview cafe on deck 11 is not as good as it used to be, but try it at least once. Don't bother with the crepes they make by the Solarium, but the wraps are good.
Dining room food: I found it to be pretty good, but of course not as good as Celebrity which is superb to me. The chilled soups are excellent. The beef was very good and so was the fish dishes. Keep in mind if you don't like it, send it back and order something else. I had 14 nights of the Jewel food, and found something I liked every night. I asked the waiter what he suggested and he was usually right on the mark.
Specialty restaurants: Went to Portofinos twice and Chops once. If you had to choose one night I would go to Chops. Sorry they do not offer lobster. They had salmon, beef (different ways), lamb and veal. The sides come family style, but they had a nice selection.
Of course Portofinos is nice if you like Italian food. I like to order a beef dish and order a one pasta dish to share with the others.
Room Service: Did only breakfast and it was good. Order the omelets though (real eggs). They will call you before they bring it. Have some dollar bills stashed in the drawer for tips.
Itinerary: The Eastern Caribbean itin was great. San Juan, St. Thomas, St. Maartin, Antigua and Nassau was on my itin. I have been to these islands before, but not really a beach person, but if you like the beach look into St. Thomas and St. Maartin.
For Jewelry shopping I think St. Maartin has better prices, but you have more selection in St. Thomas. Antigua has some nice shops as well. The only excursion we did in St. Thomas was a private 40' sailboat/snorkeling trip out of the Red Hood Marina. If interested it was the www.sailwinifred.com
I would suggest in St. Maartin to do the ship's excursion where they offer a bus tour to the French side you pick up a catamaran and sail back to the ship. It's a nice way to see the island.
Western itin is Key West, Cozumel, Costa Maya and Grand Cayman. Key West is the best port (I even got married there 16 years ago, so it's dear to my heart). Cozumel is up and running, but you will be tendered since the pier got heavily damaged. The best shop is Los Cinco Soles. I would just take a taxi there. Nice jewelry, onyx, 200 kinds of tequila and if you bake you must buy their vanilla. They can be a bit pushy in Cozumel but not in this store.
Costa Maya was okay. They built a new pavillion for the cruise passengers, lots of shopping and there's a huge built in pool in the middle. Sorry I didn't get off the ship in Grand Cayman since I had been there before, but I know they have some great snorkeliing.
I was in a D1 Superior Balcony on deck 10 midship port side. The ship was very steady and I didn't feel it rock and roll at all. We had beautiful weather so the seas should be calm this time of year. if you get seasick, consider a cabin on decks 3 or 4, less rolling there, so I've heard.
My cabin was under the pool and the one night they had a buffet and I did hear chairs moving and music, but it didn't bother me.
The Jewel is a Jewel and I would definately go on her again. The mega ships are not my forte anymore. I'm a Celebrity fan, but if I were to choose a RCL ship "the Jewel is the one" I would pick again.