Diego was an amazing tour guide. He was on time and had nice transportation. He had all the details worked out and guides available at every stop. This tour was amazing swimming with sea turtles. The guide helped us to spot them and Diego took pics. The underground river was a very cool experience. It was private and non commercialized. He provided great context and history. It opened into a beautiful cenote. Then he took us to eat at a wonderful taco stand. Everything about Diego as a guide AND this tour was top notch and I highly recommend both.