We usually reserve the Sanctuary on Caribbean Cruises. I like being able to rely on having a lounger and I like the shade. I also like the fact that on most ships the Sanctuary is adjacent to an adults only pool. On the grand class ships you go down a set of stairs to the Lotus Spa Pool (available for all adult age passengers at no additional cost) ob The Royal class ships the pool is just outside the Sanctuary. The service is great with easy food and beverage delivery and a special Sanctuary menu. For me, the $30/day to have your own reserved lounger is money well spent. If you try it, I hope you enjoy it.