Hi,
I am Marco, the owner of Extreme Control and I guess I would give you a biased answer but if you want to check out reviews of our clients please go to http://www.tripadvisor.com/Attraction_Review-g150813-d1443385-Revie.... I can tell you it is fun! We hope you want to join us info@extremecontrol.net. Please let me know if you have questions.
Marco has been around for a number of years and runs a great kite boarding school. Lessons are really individualize for you. Fun way to send a day or 2. I actually will see him on Thursday of this week in Tulum :)