I've been singing with Rock and Roll bands for over 20 years. I've taken lessons from many excellent vocal teachers and spent a lot of money learning how they wanted me to sing. This approach was the first that took most of what I thought was the "correct" way to sing and corrected the mistakes I'd been making for years!!! Over the past several months, working on my own and "putting" the time in to rehearse each day for a minimum of a half an hour, I find my range has increased, I have better control of my voice and the original "breathing" techniques I was taught almost got in the way. This is an excellent investment and works!!! You can also find teachers in your area who teach Seth Riggs style so you can improve beyond this. As it states this is a complete program. Follow it and you will become a better singer!!