If the catamaran sail and snorkel is on the Fury, it is wonderful. You get to enjoy sailing, some time snorkeling and then some time at a beach where they have food and drinks you can purchase. On the way back, they serve unlimited corona, margaritas and punch. I think we paid $42 for adults and was well worth it. We also booked the bus to Cancun, but couldn't dock because of a barge that had broken down in the channel. Went to Cozumel for a second day so don't know about Cancun/Calica.