In mid December 2017 I wanted to try diving and i was advised by my local friends to contact Tec Dive Guru. They offered me different options as diving in the sea or going to the casa cenote near to Tulum ruins. The instructor Alexey took me there , gave a full explanation of the process and made me practice some exercises such as taking of the tube and taking out from the mask underwater. He was very attentive and felt very secure all the time. With his 20 years diving experience he is just so passionate about his work. I enjoyed a lot and almost lost my fear to profundity. I immersed twice , each time about 40 mins. Casa Cenote is an amazing place to practice as it is max 6 meters deep and the cave is uncovered so you can go up at any time. This was one of the best experiences. If im back to Mexico I will definitely return diving with Alexey!!!