What Harmony of the Seas excels in is variety, whether you're talking cabins, entertainment or dining. Even cabins in the ship's lowest category are thoughtfully designed and comfortable, with space for relaxing and plenty of storage. Likewise, the entertainment onboard, whether small scale, like an acoustic guitarist, or larger than life, like the production of "Grease," is simply outstanding. The ship's restaurants offer everything from low-key grab-and-go meals to multicourse, hourslong culinary extravaganzas, though be prepared for a variety of quality with the extra-cost venues generally being much better.