I've done 5 or 6 solo sessions in the past year since reading this book, sometimes mixing a tab of LSD as well to go a bit deeper. They have all been different but have largely gone as described in the book. I've done a lot of therapy in my life and personal growth is a priority in my life.
As a result of these sessions I've overcome some serious challenges that I had previously assumed were static aspects of my personality. It has been challenging to be sure, but much better to deal with things head-on for a short time, than to deal with them low-key forever.
Thought the community here would appreciate this given the mild interest/openness to psychedelics.
I'd be happy to answer any questions about my experience so far, ask whatever you'd like!
[edit: missed a word]