Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A most worthwhile purchase!

Of course it cannot serve as a total substitute for experiencing the real thing, but this book still manages to share a tremendous amount of knowledge in a very accessible format. It contains gorgeous, often stunning, photography as well as helpful and concise instructions. I particularly like the conclusion of each section with a passage of philosophical thoughts. The book does a great job with balancing the presentation of techniques for improving oneself both physically and mentally.Even if you ultimately do not adhere to the exact 28 day regimen as suggested by the subtitle of this book, you will most certainly find many valuable lessons to incorporate into your daily life.