Tony, I am 71 and have been trying to learn to play the guitar for several years. I am an AV guy professionally but I really want to learn to be a competent acoustic guitar player. I have tried in person instruction, online courses, the great courses and back to personal instruction. I ran across your website, listened to your intro video and signed up. Although it has been only a week I am really having fun playing guitar. I have learned chords over the years but never seen the extensions that you include in your lessons. They are a magic way to leverage existing chord fingerings with minimal additional effort. I am spending more time at practice as I return to the prior lessons as a warmup / refresher for my lesson that day. I am really glad I made the investment in your guitar course and I think that it just might stick this time. Thanks!