I took a private class with Pat Keller to get certified before I go to Costa Rica, and Pat really worked with my schedule to get all the class and dives completed before I leave. He was a great instructor! He really knew all the material, and he made the class fun and enjoyable. I feel like the information really stuck with me. On the dives, he was very in-tune to what was going on and had great advice on how to become the best diver I can be. I look forward to getting my advanced open water and adventure dive certifcations with Pat!