As the island is not so big and the roads are good, it's easy to discover more in just a few days, providing that you have transportation.

Many of the most stunning beaches are situated along the west coast, near each other, therefore it’s convenient to rent a car to see more and stay flexible. 

If you’re looking for a reliable rental company on Aruba I can highly recommend Amigo Car Rental.
When you arrive at the airport you will find their office just across from the arrivals hall. Their cars are quite affordable, starting for $149 a week, inc. aircon. And when you book online their 3 day - weekly rates are discounted 5%. 

With a fleet of 151 cars they have a wide range of 10 different models to choose from. 

They also have an office near Oranjestad and offer free pick-up and drop-off to and from your hotel. I always prefer renting a car, as it gives you the freedom to see so much more of a destination whenever you want.