Solid instruction. My dad an I met with Dennis for a refresher course before heading on a vacation to Maui. We arrived early and everyone in the Scuba shop was welcoming and friendly. For the refresher class, it was only my dad and I with 1 instructor! Dennis provided great instructions that were clear and easy to understand. No rushing and a genuine commitment to making sure we were prepared and comfortable with SCUBA once again so we can enjoy our fourth coming trip.