In Mexico we did go to Mr. Sanchez for the all-inclusive. We had a wonderful time and well worth the money for all you can eat and drink. There were kayaks included in the price and a water park for an additional $12. Taxi was $32 each way for 6-8 people.
In Grand Cayman we used Stingray Sailing tours and there were only 8 of us on board. Chip and Kevin were great. My grand kids were not overly fond of the stingrays or the ocean, but they enjoyed the catamaran. Again, Kevin took the time to take my grandson (9) out and he was able to snorkel without being terrified.