In Ios, my boyfriend and I decided to get our open water diving certificate. Well, Tolis was a great instructor (as well as Allison and Dave). They take the scuba lessons seriously so you feel truly like you've learned how to be safe. But...teaching with a wonderful carefree attitude, full of jokes and smiles. This took away a lot of my fear for diving since this was my first diving experience. After a couple of days we passed our exam and got our certificates. SO MUCH FUN. The wreck dive was awesome and we even saw a turtle! So cool. Thanks to this team I am now in love with scuba!