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This book did give some interesting insights into the companies but became very boring and annoying.

The first half of this book consists of four chapters on the four companies, which for the most part was good. The writing is informal, which I don't mind but every chapter (near enough every page) went on a tangent to the points that were being made. If the book was more concise I would've definitely given more stars. The second half of the book becomes very annoying with more, longer extraneous examples and I nearly stopped reading it.

I would reccomend this book (the first half) to give perspective on the companies and to get a gauge on the scale of them. Its not a very long book but would have benefitted from being shorter.