Title: the only training in voice you'll need to achieve your perfect ideal natural voice
Review: This book is not just a book. It's training for how to use your voice organ. It explains how the voice works scientifically. No need to sing out your lungs or do yelling drills. If you do the exercises it will improve your voice. He even guaranteee your results if you go through the exercises. No other material like it around. This system works with how your voice works naturally by mastering control of your voice organ.
Is this product review negative?