Just did this in February.. Very cool. Didnt feel the need to use snorkel equipment with dolphins but the rental was pretty cheap ($5?). Plenty of places to snorkel and X-caret is absolutely awesome, both in size and scope. Great restaurants but a expect to pay for it. We ate at La Laguna. Its all you can eat buffet was out of this world but was $20 per person. $100 for lunch but hey, you only live once.