Discover Corps's Celebration of Arts and Culture program is really special. I highly recommend it as an introduction to Cuba, a beautiful country full of creative and friendly people. The best parts of the experience, in no particular order, were the small group size (three travelers in my trip), food (!), the ever-present art and music in Havana and Trinidad, the different varieties of city architecture (especially in Havana), and our funny and very knowledgeable guide, Ela.
Discover Corps provides several great activities, including visits to the community art project Muraleando, the Havana Museum of Fine Arts, a tour of Old Havana, the Bay of Pigs, and Hemingway's home.
I would recommend that all travelers with Discover Corps review the online Travel Portal for their specific trip, as a lot of helpful information is listed there regarding currency exchange, local customs, suggestions for tipping, and even recommended reading material. Staff members are also available to answer any questions from prospective travelers.