This is a book that is excellent for beginners, intermediate and advanced students. For the beginner, it sets a framework for understanding meditation that will be useful as a frequent reference. For the intermediate and advanced students, it seems to address issues that they will experience in their own meditation practice. It also provides a vast amount of information that is worthwhile to learn about, whether one is able to experience this in their own practice or not.
The book increased my desire to practice and experience what I was reading about. It should be the foundation for any meditator's library.
This book packs an enormous amount of material into a well-organized exposition of vipassana and buddhism generally. It is informed by a very rigorous practice and comes about as close to dharma as words can.
It is highly recommended to experienced meditators who might find very basic books repetitious, and for earnest invididuals who want to learn a whole lot more about buddhism.