Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great book, but lacks examples

Although it is titled as "Practical", the greatest problem of this book is the difficulties to put the methods it suggests into practice. At least, an example for each problem frame, but this book has only one case study that covers the information and workpiece problem frames only. Nevertheless, this is a great book that takes a radical approach to requirements analysis. So I give it 4 stars.