I took alexander classes a few years ago after a car accident that broke my neck and almost killed me. after surgery I managed to walk away but obviously took with me serious neck issues. I wont go any further into details other than to say that almost instantly (!) during my first classes my neck felt much much better, as if someone had oiled it and loosened it up, and I was an instant and very surprised convert to a subtle and frustrating and amazing process that went much further than just recovering from an accident.
I borrowed many books from my teachers, across a spectrum of styles and approaches to the subject, (dont bother with the books by Alexander himself, they are a mess, as gifted as he was the guy couldn't write) and this one is the one I liked the best. I have to admint that starting the book I didn't like it so much for a reason I cant really pin down, but by the end I had changed my mind and thought it was an excellent overall explanation and very incisive and clear. Made me much more aware of the "mind, character and attitude" side of the technique, rather than just the physical aspects.
When I recently wanted to brush up on my alexander technique, I bought this book to refresh my memory. Reading it again, I can only say I still like it just as much.