I believe that you'll like the ship, as it is our second favorite class of ship, the Radience class. We have been to two of your stops before; San Juan is very interesting, and we also like St. Maarten. We have not done a Southern Caribbean cruise, and have not sailed out of San Juan. If, like many, your cabin is mearly a place to store your things and sleep, then cabins low on the ship (deck #3 in your case-I think) will be fine. There is some shopping onboard the ship, but not a Royal Prominade type area. We felt that this size ship seems to have a little more "classy" feel, and we liked her very much. Exept for your cabin choice (I prefer higher up and with a balcony), I think you'll enjoy your first time!!