Great
The Cenote experience and guide were excellent, it included cave and open cenote. We did this with teenage children, and they all really enjoyed it. As other have mentioned, you are left for several hours after the experience at the cenote site with nothing to do. We got to the cenote site around 9.30am, and were told the bus pick-up was at 3pm. Cenote tour lasted about an hour and a half. I'd still recommend the experience but take food or money for lunch and be prepared for a long wait.