We stayed in Aruba for 2 weeks and the beaches and shopping are great. The prices were around 50% cheaper than in the UK, may not be so cheap for US visitors. In the UK it is not so common for me to be walking around with Ralph Lauren, Tommy Hilfigger, Armani and other shopping bags full of goodies especially on each shopping trip.
There are 2 main beaches Eagle Beach and Palm Beach. Eagle Beach (20 mins) is slightly closer to the port than Palm Beach (30 mins). Eagle beach is quieter and very pretty. Palm Beach is commercial, good white sand, boardwalk between beach and the luxury hotels, lots of bars/restaurants to choose from. Thatch umberellas, beds and floats can be hired for $10 per day. The sea was slightly cooler than other caribbean islands we have visited but the water was so turquoise. Water sports of every variety are available.