Hey BBB, this is definitely a class every manual therapist should take, definitely no BS. In fact, it's just as useful for trainers.
There's different levels, so far I've taken the CTT, Certified Trigenics Trainer class. There's two components to it: an assessment one, and a treatment one.
The assessment is the traditional the break tests. I was using a different assessment method and didn't know of these, so I found it useful. Dr. Austin calls this the Neurokinetic assessment, as it shows the strength and flexibility of muscles in the body.
The other component, the treatment, is very easy, quick and almost fool-proof. It allows one to quickly re-estblish proper length/tension relationship in the muscle, boosting strength or flexibility in seconds.
The results are also very stable and long-lasting, as they act either on muscle spindle or on GTO, depending on what you do, on a reflex level. That the "nervous system" re-training Dr. Austin mentions.
This level is not mandatory for manual therapists, but is for trainers. The other levels show more advanced techniques and I plan on being in the class that takes place in Toronto in August.
Although I'm not certified yet in ART and Z-Health (plan to though), I've been treated in ART and researched Z-Health a lot and I can tell you this is different, but complimentary. One major difference though, is that Trigenics can be done easily in the gym, and has quick results on clients. It's a tremendous tool to have results, and a very good selling point, both for personal training and for treatment. It gives an appreciable help in client confidence when they see that not you can talk the talk, but also get them to walk the walk.
I highly recommand you get a treatment before attending a class, but you'll be amazed at the results and regret taking a class. It is money well spent and a great return on investment in my personal experience.
Do ask me more precise questions if you feel so inclined. If I can't get a proper answer, I'll ask to my contact at the Institute.
Hope that helps!