I started this last year when I decided to quit Uni and was trying to find myself.
I knew too little about myself and did too few things in my daily life to get much out of the book and it's exercises. I didn't want to DNF and told myself this book could help but I just couldn't answer many things or do the exercises correctly, so o just slogged through the pages and didn't get far.

I now have a job and my life has changed a lot since starting this book and I would need to start all over again to get anything out of it. Hence DNFing. (For now)

I do think this book can help in finding passions and realizing what you want and don't want to do but for that you have to be already doing something.
If you are stuck in limbo and literally just existing, this book is probably not the right resource at this moment.

I do plan on picking this up again in a few months or so because I do like the idea and think it can help me recognize things about myself.
It was just the wrong time for me to start it.