First, let me say that I love Francis Chan's teachings. Our small group is watching this DVD and going over the accompanying study guide. Overall, the DVD sessions are very short (between 5 and 11 minutes) and so far, our group has had a hard time understanding his point during the teaching time and how it applies to the teaching material. It seems as if he's just speaking off the top of his head without having a clear direction. Our group just finished a DVD/study guide series from a different teacher and maybe we're just used to seeing more didactic teaching.
Francis Chan has a very good way of challenging people to live in the power of the Holy Spirit and to obey the promptings of God's Spririt using analogies that are quite powerful. Our Bible study group is going through the videos along with the workbook and we are all finding it quite valuable.
This is a nice addition if it is in your budget. Challenging. It won't take a lot of time as the sessions for each chapter are only 10 minutes give or take. I wouldn't say you would miss out without it, but it is nice to have. You MUST have the workbook however!