I am a technical cave diver and have had two different instructor's both were good and gave me the trust in myself. The security that I could go into a cave and get out safely. Because I had the proper training. The first instructor I received cavern and cave certification from, and the second I received my technical cave certification from. Plus I didn't skimp on my equipment it was too notch, I didn't want to be in a cave and find I wasn't getting the air I needed.