I've been using this book every morning for the past 6 months and it's done wonders for my range, agility, and accuracy. Working your way up through the exercises is fun and never gets old. Also, the vocal talent in the cd is quite consistent and clear, great for ear training; accompanying staff helps with sight reading too . What I love, is that each exercise targets specific issues, allowing you to focus your energy on one problem at a time... very effective. I would recomend this book to brand new singers as well seasoned vocalists. The lessons are very targeted towards common singing techniques found in pop, rock, blues and jazz; though if you are a classical or operatic singer its probably not your bag.