You might want to join their list and read the archives at Yahoo groups for a while before buying. I do think it is a good idea to read what you can find on NLP as well. The way Tom and Kim teach anchoring is different than what is usually taught in NLP. I was taught how to anchor in a formal therapy situation and am pretty good at it. After attending the class I was able to help a co-worker with his chocholate addiction. This guy ate about a pound a day. As I was talking to him, explaining hypnosis and his addiction, I used Tom's covert anchoring methods and fixed his problem. Then I put him into trance and did some hypnosis. The work was actually done before I hypnotized him.
