Koolina location is magical!!! With the kids lagoon area and 3 other swim areas plus the beach right outside the property it is a great option if you're in Hawaii!!! They do check if you're a guest so be prepared for that. We did not have our "swim bracelet" on us and we had to go back upstairs to find it even though we had our room key to show them. I felt profiled but everything else was so great it definitely did not ruin our vacation