Punch & Roll is worth the effort and can change your VO life. Check out this lively discussion from two people who didn't think it was going to be a win in their early days, today they are like ex-smokers, and would never go back to the old school clicker, keep on rolling, extra work methods.

Also available in video format on Youtube on the "RedBaarnsAudio" channel:
https://www.youtube.com/playlist?list=PLEkiX1v9vUsr-bmbUFKwwRTWvJM67mba7