Harmony of the Seas receives high praise for its impressive ship design, wide range of activities, and exceptional service from staff. Most guests found the ship clean, well-maintained, and ideal for families, with plenty of entertainment and dining options. However, some reviews mention issues with crowds, elevator wait times, and occasional lapses in food quality or specialty services. Pricing for extras and some specialty services drew criticism, as did the handling of certain excursions and communication. Overall, the cruise is recommended for families and those seeking a lively, activity-filled vacation, though some guests prefer smaller ships for a quieter experience.