The Berkley method can be summed up in one phrase; teach by example.
This is a must have for any serious guitarist, a valuable collection of scales, arpeggios, and songs arranged for the guitar. The Berkley method can do incredible things for your Sight-reading skills, left /right hand dexterity and your over all musically vocabulary. The book is not for beginners unless you have a teacher using this book with you, it does not cater to novices (no tab at all). Also I found a few errors with the fingerings.