Diving in the Sea of Cortez was absolutely wonderful. The Club Cantamar staff was very accommodating, and made sure we got to all the dive sites we wanted to see. The whale shark experience was excellent, and use of the ultra light to find the whales definitely works well. The resort accommodations were fine, but not stellar. As in many Mexico resorts, the food was just OK, and you need to be careful about water consumption & other potential sources for "the Revenge".