This therapy is very similar to Janov primal therapy. Patients are crying, are encouraged to cry and show pain, to release the pain, sorrow. Hannig says that his therapy is an excorcism, releasing demons and letting angels take over. In fact it is true, the anger is a demon, kind of and the bliss that you get after you connect the feeling is kind of an angel feeling.
I think deep feeling therapies are the future and the best solution for healing your mind.