This textbook was required in the game theory class I took in economics graduate school. For a grad text, it's simple and easy, but that's the beauty of it. I read it cover-to-cover, enjoying each page, and coming away with a deeper understanding and wanting to continue learning and applying the concepts. I guarantee I couldn't do this with the books used in most of my other classes. It helped me do exceedingly well in class and impress my department chair.
The author explains concepts in a step-by-step approach, so I never felt overwhelmed. They always returned to examples that were as simple as possible to illustrate the concepts, then built on them as you learn more through the chapters. Applications ranged from war games to business competition to downright silly anecdotes.
I see uses for the understanding of game theory I first acquired in this book all the time. People around me become interested and ask me where to get a good primer on the subject. I always recommend this book and lend it out so much that, in honesty, I should just buy another copy.