Was in the Yacht Club on this Western Caribbean Cruise. We were there for a jazz-themed cruise, so didn't go on any excursions (don't like the Caribbean, actually). Providing this review on the shipboard services.
Yacht club provides expedited embarkation and debarkation, which went quickly and smoothly. Also has separate door for leaving and rejoining the ship at ports, which was always quick and easy. It offers exclusive access to a pool area with hot tubs, bar, and a small buffet at breakfast and dinner. It also provides access to the Top Sail lounge, open 22 hours a day and with small food items most of the time. You get a butler and dedicated concierge service, as well as exclusive access to the Le Muse restaurant.
Most of the Yacht Club amenities were excellent. The Top Sail lounge, concierge and butler staff were stellar - very nice people, who were also effective and efficient. Our room was cleaned well and unobtrusively. After a quick request for different beverages at the beginning of the cruise, our refrigerator was always fully stocked exactly as we wanted. Concierge was happy to help us with anything we needed, and the staff at the Top Sail lounge was quick, friendly, and as they grew to know us started anticipating our requests. I don't have enough nice things to say about them, and if this review was about the Yacht Club experience only it would be 5 out of 5.
Cabin was clean with a small sitting area and balcony.