In case the name didn’t make this shockingly apparent, the big selling point of this adults-only, all-inclusive resort is the fact that it also has its very own island, with a pair of beaches (one for relaxing, one for sport), pool, restaurant, and Zen garden. 
Before this property expanded into a sprawling Sandals resort, it was the private Balmoral Club for mid-20th-century hotshots like the duke and duchess of Windsor and the the Beatles (who stayed here while filming Help!). 
These days, guest quarters are nicely kitted out with elegant West Indian–style furnishings and four-poster beds, French silk rugs, and Italian ceramic tiles. There is a dizzying array of room options (and packages that include airfare, spa, and/or tour credits), though—aside from size and view—it mostly boils down to this: Club Level rooms gets you a higher degree of services; Butler suites will nab you a personal butler who will help speed up the otherwise “island-time” pace of generally friendly service. 
Rooms in the Balmoral Tower tend to be quieter, if only because the Windsor Tower overlooks the central pool (though the Windsor does have the ultimate luxury: swim-up suites). However, for optimal quiet and seclusion (though, sadly, no sea views), stay in the Royal Village, a collection of small, four-unit buildings interspersed with whirlpools at the back of the property. 
Sandals’ brand of all-inclusive covers not only the usual basics (room, booze at the bars, snorkels and kayaks, meals—though note you must reserve a table at the a la carte restaurants) but also unlimited premium-brand drinks and, unusually, scuba diving—a dive per day for newbies (after an introductory course), up to two dives per day for certified divers.