We did our first cenote/cavern dive with Hidden Worlds in December. Our guide, Jeff (don't know last name but he's from TX), was great. Our first dive was just the two of us with Jeff and it was about 50 minutes. The second dive was 4 divers and Jeff and it was 35 minutes. We were not rushed. Jeff told us the 2nd dive should have been about 45 min but one of the divers was having ear problems so the dive was ended. There was a group waiting when we exited, but no tight schedule or rushing with short dives or anything like that. It was a bit touristy with the jungle truck ride out I guess, but the Hidden Worlds dive in Dos Ojos and Bat Cave sure seemd great to us. A wonderful introduction, and it's peaked my interest in cavern diving. We're going back to Akumal later this year and want to dive another couple cenotes/caverns. Depending on how that goes, I may take a course.