We really enjoyed our stay at Sand Castle 1.
Highlights were: the hot tub overlooking the ocean, the views from the kitchen/dining room/living room, the cozy fireplace with timer, well stocked kitchen, the bunk beds for our kids, the fact that we couldn't hear our neighbors in the other half of the duplex, though it was occupied all three nights we were there, the washer and dryer for cleaning towels after hot tubing, and that we could walk down some rock steps and be right on the beach! It was delightful.
The bunk room, one bedroom and two baths are on the main floor with the one-car garage. The kitchen, dining room, living room, and a bedroom and one bath are on the 2nd floor.
The place is showing some wear, as others have said, but it was very clean.