After 20+ years of playing the drum set I can hear and feel most standard rock and jazz rhythms fairly easily. But the rhythms in this book are so different that I find myself challenged in each exercise---even the simplest ones! This book will really help the drummer who is comfortable with current and past rock and jazz styles, because it is a huge stretch from the 4/4 and 3/4 that most of us spend virtually all of our time playing. More than anything, this book will help your overall sense of time, because its contents are so different from the American rock-pop-jazz genre, that your brain will have to work overtime to master them. It's helpful if you have some Latin traps in your kit, but not necessary to reap the full benefit. Couple this book with Gary Chester's New Breed, and you'll step into a new phase of musical creativity in your drumming career. The included CD is really essential to understanding the groove of these exercises.