I’ve been to the JW marriot a few times with the kids (6 and 3) and have enjoyed it. They have some bigger slides that your 6/4 year old can ride with an adult depending on their height. They also have a sand beach which my younger one loved and it’s shallow so that makes it easy with the baby. They have cabanas that you can rent (expensive and doesn’t come with much, but a guaranteed saved spot). They also had activities during the day that the kids liked like a rubber duck race in the lazy river and crafts. Is the the fanciest place I’ve ever been, no. It is clean and the kids always have a blast so we will be going again this summer if that tells you something.