St. Thomas has a very beautiful beach - Magen's Bay. It is definately worth going. Also, you can go to Mountain top for a beautiful view of Magen's Bay and some very yummy Banana Daquiris. If you are also going to St. Maarten, the shopping is better there in terms of prices. Especially on liquor, but also electronics and jewelry. We just did that itinerary 9/7 on CArnival.