We are long time Princess cruisers, and took our first Celebrity cruise this past month. Absolutely fell in love with the free of charge thalassotherapy pool in the solarium on Millennium. Also enjoyed the fewer passengers, smaller ship vibe. Does not look like all of the celebrity ships have the thalassotherapy type pool in their solariums. So far, I just see it on Summit, Millennium, and Reflection. Any others? Thank you!