last month.
The course consists of a morning of lectures covering hydrogeological, biological, and archaeological features of the area. Accompanying the lectures are a video, an aquarium, and a few quizzes on the material (nothing overly difficult if you're paying attention).
Following the classroom session, you're given a tour of Spring Lake in a glass bottomed boat to observe the springs, vegetation, fish, etc. A break for lunch and then diving starts.
Divers are required to successfully complete a circuit of an underwater obstacle course and demonstrate enough buoyancy control that they are able to stay off the bottom and not disturb the flora and fauna. After the training course session is completed, divers are taken on a guided night dive of the lake.
Class resumes the next morning with training in revegetation and spring cleaning techniques.
I had a good time, met some nice folks, learned some interesting facts, and have already returned to help with some reveg/weeding efforts.
The price is a little steep, but it goes to a decent cause and allows you access to a very nice dive spot. The fish are plentiful, vis can be very good, and the water is a constant 70ish degrees.
I thought it was worthwhile, YMMV.