I gave this book 4 stars because I believe, when it comes to personal growth, if you can take away one solid lesson learned from any experience you are better off than when you started. I read many of the previous Goodreads' reviews of this book and I think, to a certain extent, I agree with them all because it's a matter of individual needs and perspectives. Self-help books are personal in nature and we tend to look for one that fits nicely in our comfort zone. Change is difficult and we want something that will make it less so, perhaps even easy. Some people thought this book was too short, some thought it was too long, some look for research to back up the ideas presented, others eagerly jump in with hope and wanting. In my opinion, the book is short and easy to understand, thus requires little investment of time or effort, so even if you don't jump on board with the 40 day project, you are likely to find a nugget of inspiration somewhere in there. As a therapist, I know self-help is about moving one foot away from the other (nope, not always 'in front of'), this includes small steps and large steps. Melody Beattie is not a researcher, she does not hold a PhD or head a large corporation - she speaks and guides from personal experiences, many as an alcoholic - which to me makes her real. While I don't relate to those exact experiences, nor am I as new age as she seems to be, I found a nugget that helped me move one foot away from the other.