I did not pay the extra to use the thermal suites. I was surprised it was not included with the spa $$ we already spent. We enjoyed the retreat deck when we could find an ounce of shade- there's plenty of chairs but no where near enough umbrellas. The lounge is nice but thinking you can skip the premium drink package and just get drinks there is a fallacy. Luminae service is 10/10 but if you like quiet dining Blu was better. On this boat, for this cruise, if I could do move up again, knowing what I know now, I don't think I'd spend the money.