I used to go to Aruba annually for about 5 years. My stay was typically 2 weeks. If you don't mind timeshare presentations, you can get a car for free for a number of days which allows you to go the Natural pool (must have a 4 wheel drive) and also what used to be the Natural bridge, Baby Beach, and over to the "rough side" of Aruba. The buses are very very cheap and easy to use from the Hotel strip, to the supermarket, into town and back. Men are not allowed on buses without shirts. It is a small island and you can see the whole thing in a couple of days. As stated earlier, it really depends on you.