One thing I adore about CA is his clarity. His program is fairly easy to follow, and it does work. I am a picker and a chooser, but nonetheless I am a follower.
The No Worries Club, for me, was a total waste of money, as I am not getting what I feel I should be out of it, though the friends I have met through the club are well worth the money for me. For those that stick with the program and follow it more than I do, it is a good buy. I wouldn't start out with that, though.
For the DVDs, if you haven't already bought them, I would suggest getting the Gaining Respect and Control on the Ground, and also the Riding With Confidence DVDs first. I think any avid CA person will tell you to start with those.