I waited about three months before reviewing this book, because I wanted to give the excercises time to pass or fail. Result: clear pass.
From an old injury and long hours of computing and poor posture, I've spent YEARS enduring neck pain that went from chronic and bearable, to unpredicatable bouts of incapacitating. I've done the chirporactic thing on and off and the problem always recurred. I was ready to try pretty much anything when I ordered this book.
There's nothing instantaneous or mystical here, but three months later and there's a very clear reduction in the frequency and intensity of the chronic pain, and my neck hasn't 'gone out' in the whole time, despite things like 10-hour flights and 70-hour weeks.
The excercizes are logical, simple, and not time-consuming. You could probably get them all onto a couple of sheets of paper but you might as well just buy the book (I got the version with both the back and neck excercises, just in case...). Here's hoping another several months of this kind of progress and I need never deal with this 'pain in the neck' again!