I recently finished two back to back Tech courses with Andy Campbell and Evan Hazlett at Big Blue Tech. The courses were TDI Sidemount and SDI Solo diving. In a few words, it was perfect balance of challenge, fun, precision and professionalism. Everyday, they devoted their full attention to keeping me safe, pushing me harder than I thought I could go, and being so generous with the information that our days would typically end with chat sessions where they would share experiences and information they were not required to give. You don't get that kind of dedication in many places. In the water they clearly know what they're doing and at no point, though the skills and situations could be a bit intense/FUN, feel like I was not in the best hands.The sidemount course has given me a new way to dive and taken my own skill level to a new place, and the solo course has given me the confidence and ability to go and be with the ocean by myself. There's nothing like being in the water with just you and the fish. These guys are the best and you would be missing out not to come and take a few courses with them. Can't wait to get back there and keep on learning.