This book is designed for and will be "life-changing" for middle class (probably) white women who are struggling to balance the pressures on them from their careers and family, who spend all they earn to keep up with others, who lack self confidence, and who highly value aesthetics. It reminded me a lot of "Girl, wash your face" and will probably be successful in the same demographic.
If you have ever read any other highly researched personal development books by experts in their field you'll find what DeVor writes to be overly simplified versions of other's concepts. If you have ever gone through a few sessions of therapy, that probably gave you more profound insights than this ever could.
If you're the type of woman who wears whatever you want, decorates however you want (or ignores it because you truly don't care) and eats exactly what you want but still have issues with self doubt because you're loud and "bossy" in a world that tells you to be quiet this isn't the book for you.
All of the exercises she lists (taking a picture of your front door, taking a selfie, taking a picture of your plate, etc.) involve an assumption that you as a listener know what you want/need and are just ignoring it because you don't value yourself. She completely ignores the idea that people could lack the resources to change their front door, that they may not value their outward appearance, or that they may be perfectly capable of sleeping extremely well on an unmade bed because they prioritize their time on things other than setting up the perfect throw pillows.
DeVor clearly values aesthetics far more than I ever will and assumes that all listeners aren't valuing themselves if they don't value their outward appearance. I doubt she looks at a picture of Mark Zuckerberg and thinks he has a poor sense of self worth, but if she saw a picture of me in similar clothing with zero salon visits for my skin or hair she would tell me I have a horrible sense of self worth.
At the end DeVor comes so close to acknowledging her privilege, but never actually does the real deed. Acknowledging that she was privileged to be conventionally attractive and meet Benazir Bhutto is not the same thing. It comes as a throwaway comment after several minutes on "toxic guilt" over being ashamed of your privilege, which is what really made this a 2 star read. DeVor has a lot of work to do in understanding that her "insights" are built on the backs of others and that her advice comes from a very out of touch place.