This was probably one of the best documentaries I've seen in a long time. It's funny, entertaining and surprisingly informative. The film delves into many fascinating subjects such as "Wizard Rock" and a hilarious alternate soundtrack called "wizard people" by animator Brad Neely. I was very surprised to see so much about copyright and creative control in the film as well - it was both informative and eye opening at the same time.
The film does have some strong language, so watch it before you rush to show your younger children. However, this film is as much about inspiring creativity than it is about Harry Potter as an icon. It makes my want to go start my own rock band, or make my own alternative MST3k style soundtrack. It celebrates creativity and is an incredibly fun watch. I highly recommend it!