Based on past experience in June 2023 out of Brooklyn, I had to go to spa and make a reservation forhot what time and day I wanted to use the thermal suite. In addition, to the free hour based on my diamond status, I prebooked the thermal suite for unlimited access throughout the cruise. It was a really good price. Upon checking in at the spa I was told that I would have to make reservations for each time I wanted to use the thermal spa. It was unlimited however, I did not like the idea of having to plan and book time to use. The thermal spa was nice place to relax an enjoy. Drawback the hot tubs were not hot at all. Luke warm at best.