If you want to be able to impress people by being able to finish a cube, buy this book. You'll easily learn how to conquer the cube in less than 5 minutes every time. My average is about three and a half minutes, and i only do it to impress people. If you learn more of the moves, you actually can finish it in 45 seconds, it's not just a sales pitch, it's possible. This book will teach you how to complete a cube, however, it won't tell you the reasoning. Basically it's a system of moves that work extremely well. I would suggest this book to anyone, especially advanced cubers.