I have seen this book advertised in guitar magazines for years, but I never considered getting it because I had assumed you had to read notation in order to use it. but it turns out that's not so. a friend has it and said it was very useful to him. the book is built (apparently) around 5 patterns. my friend said it took him about a year to really learn the patterns, but his playing really took off once he mastered them. so does anyone here have experience with this book?