All dempends on how often you think you will need it after this cruise. If this is your one and only time, rent it from the ship. If you know you will be using it again you can purchase your own set (good equipment at decent price via the web). Just remember to rinse it off well when you get back to the ship. I soak the masks in the sink and run water through the snorkel. I rinse the fins off in the shower. Salt water is ver corrosive. When I get home, it all gets a bath again before it gets put away.