We love SAB!!!
It is huge--a mini water park.
You do need to keep an eye on the young ones--it is a zero entry pool at some spots. There is an area where it is not very deep and there is plenty of sand to play in. Our boys (7and 5) LOVE it.
It is a short walk actually, even from the BC villas.
If you are staying there, I would HIGHLY recommend taking advantage of it.