Most of us have heard of the Linden Method. I personally don't know anyone who has actually shelled out the cash to try it, though.
I also read some reviews and they were all saying the Linden Method was a miracle, it saved their lives, it works immediately, blah, blah,blah. Then I realized that all these reviews had come from the Linden organization itself. Google something like "bad experience Linden Method," and read some entirely different reviews.