I purchased this book based on recommendations by both Ken Wilber and David Deida. I felt that if they suggested it, there would probably be significant benefits to be had. This assumption has proved correct.First off, I like this book because it isn't a strict "How to" guide. Yes there is a section that presents those considerations, but primarily it is a book that presents the experiences (good and bad) of a number of different couples. In reading these stories one comes to the conclusion that there really is no concrete pattern that occurs...each couple's experience is unique. This, in my opinion, mirrors the spiritual realities that I have witnessed (modest as they are).I also like that the downsides are not ignored. One chapter in particular (chapter 10, Why Didn't Anyone Tell Us This Before?) specifically address some of the painful side effects that can occur, and offers some important precautions that should be observed. I personally appreciate this responsibility on behalf of the author.If you are interested in the spiritual aspects of sex, I heartily recommend this book.