I studied this book as part of the Strategy module for my MBA and found it comprehensive, thorough and relatively easy to read and digest.
There are many good strategy books that provide excellent insight into key parts of strategy, this one gives a solid grounding across all the disciplines (including work by Porter, Ansoff, Hamel & Prahalad, Ohmae, Chandler, BCG, McKinsey etc.).
Highly recommended for strategy students and executives looking to build a thorough and credible knowledge of the subject.