The boy had his first experience with D&D tonight.
(his sister wasn't quite as enamored)
Verdict: the choose-your-own-adventure style character creation is a quick, easy, fun start-up for ultra-n00bs like my 9-year-old son. However, it's really only good for introducing one character. After that, you either have to hope the other players will diverge widely from the path the one first took, or you're going to have to get creative.