Professional, they were meticulous in their attention to safety. They were also fun and upbeat, and it felt like some new friends were inviting us to go check out their hobby. They had two divers with our group, and did a great job of keeping us headed towards points of interest without being rushed.
If you go, buy the pictures. It’s $60, and the 150+ photos and videos he took are much better quality than my GoPro.