excellent IF you pay attention to following: 1. go in your swim ware: there s no place for changing. you ll go from boat to sea and the boat is full barely space to stand let alone change clothes. you will dry by the time you r back at the port. 2. take your own snorkeling kit if possible for adults and definitely for small children. 3. bring water especially if you are with kids. 4. bring some first aid stuff: small container of disinfection liquid, clean cloth, waterproof bandage (plaster) (this one is a most), a pain killer. 5. if you bring a bag make sure it s water proof as it ll be drenched. Plastic bags are not allowed on the island so put m inside your bag if you bring them. don't bring any valuables except few money (for drinks/dessert at lunch which r not included). 6. if you do under water walking with kids bring (better come waring it) water shoes. 7. be careful, boat is old and so many steel edges and ladder joints where you could pinch your skin. (esp. kids). ENJOY.