I have stayed at both Marriotts, the Aruba Marriott was noisy because of the tile floors in the hotel. The island, I found somewhat boring. The snorkeling is great as there are so many ship wrecked boats to explore. The Curacao Marriott is very nice. The island is also very pretty. As far as a car I would get one ech day, but only for a day as you will need it to drive around, but other than that it isn't necessary