Great technique to shake unwanted things off the body. I have taken part to group sessions and it's really a great moment you spend with other people who are interested to the way the energy circulates or builds up in the human body.
However, I was disappointed, as I hadn't realised it is more a collection of experiences written by practitionners of the method, which I haven't found interesting at all - I haven't read all the texts so far though. Some are fine, but the vast majority I have read were using a dry tone of voice, and being sometimes very technical, were I expected the descriptions to be much more centered on the energetical, physiological and emotionnal aspect of the technique.
Plus, what I was interested in was the sequence of the exercises, because I haven't been going to the group sessions for over a year, and I had forgotten about the sequence.
So when I started to read the book, I felt like I had bought a rather expensive book to end up using only the last few pages of it, where the sequence is explained. A little bit expensive for 4 pages...
It's still valuable anyway, and if for the moment I don't have any interest in it, I might go back to the practitionners' experiences in the future.