The Thermal Suite is a modern twist on a Turkish bath. It is a quite area of the spa providing a Aroma Therapy room, a Sauna, a light steam room, and four large ceramic tile lounge chairs that are heated. The room has very large picture windows, providing a relaxing view of the sea. Some soothing background music is also played. It is very relaxing. The cost was $15 per day and they had a less expensive package for the entire cruise. If you pay for another spa treatment such as a massage or facial, etc., you can also use it at no additional cost for that day. I would suggest you try it once and then go from there. On our inaugural voyage, they were still fixing some bugs so I only used it once. Good Luck! When are you sailing?