I recently read Dr Berceli's book and ordered the DVD by the same name with the exercises from the Namaste website (suggested by one the reviewers here). I have gone through the series of exercises several times, so I'm probably not as advanced as some of the other reviewers here but I must say, so far, I'm cautious to continue on a daily basis as some overwhelming sensations occurred (namely, momentary out of body experiences and split-second hallucinations) . As directed, when the discomfort or feelings of overwhelm occurred, I stopped the exercise; however, there's been a residual sense of overwhelm that stayed with me the rest of the day, even after stopping. After experiencing this, I don't believe this book and the prescribed exercises are a substitute for working with a somatic experiencing practitioner or trauma sensitive somatic or body-oriented psychotherapist/specialist, especially if the trauma you experienced was severe, multi-layered or deeply buried. Please understand, however, that this was just my unique experience with this approach that I wanted to share,as I cannot imagine I'm the only one who's had this reaction to the exercise program. The key for me is that when this powerful fight/flight/freeze energy surfaces, I don't feel like Dr Berceli has really given me tools to truly integrate or understand what's happening (outside of stopping and honoring the overwhelming sensation); it just feels like "too much too soon". I find Peter Levine's work Waking the Tiger : Healing Trauma : The Innate Capacity to Transform Overwhelming Experiences to be a far more comprehensive, gentler and nurturing approach, by comparison, as his work and research over 40 yrs has centered on the nervous system and the individual's innate need for a deep sense of safety to enable a natural expansion of an individual's capacity to gently re-experience and re-integrate long dormant "frozen" and highly potent energy. Clearly, many of the readers here are having extremely positive and life-changing body responses to this work, which is truly wonderful and I certainly do not want to take away from the amazing effectiveness of Dr Berceli's unique approach. So, please do not let my review convince you not to try this work. I will continue to do Dr Berceli's exercises now and again but will mostly rely on Levine's exercises Healing Trauma: A Pioneering Program for Restoring the Wisdom of Your Body as they are a better fit for my unique experience. I just wanted to share with you the reasons for my caution and to emphasize that for trauma survivors, the body is perceived as a very dangerous place and reclaiming and/or finding resources that offer deep comfort, pleasure and safety is a vital part of reclaiming our true selves. To anyone going along this path, which I consider the deepest sense of soul reclamation, I wish you well on your healing journey!