Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Key concept, straightforward and short

Treacy and Wiersema make the case that the value of a product or service to a customer can be categorized in terms of efficiency (eg. low cost, on-time delivery), innovation (eg. latest technology or fashion) and/or customer intimacy (eg. customized solutions). They go on to argue that delivering each kind of value requires a different organization and culture, and hence the most successful companies are those whose business strategy is focused on delivering a particular kind of value to the customers that appreciate it the most, while remaining competitive in other areas. The analysis is accompanied by case studies of AT&T Universal Card, Intel and Airborne Express. The core idea of the book is valuable and 200 pages is plenty to explore it in detail.