I took a boat leader C category course with Mario Kundih after all my skipper friends stated that he is one of the best sailing instructors in Croatia. Not only that I found that to be true but I must also say that Mario is a calm, extremly friendly and zero stress guy that will in any situation that students find problematic react in the most calm, precise and profesional way while calmly explaining what to do to his students. I must also say that he succesfully transferes his huge confidence in his sailing abbilities to the students so everybody feels safe and under proffesional guidance which I find extremely important for the students. Full recommendation!