My overall thought as I watched this movie was if you aren't a fan of MJ, this movie won't mean anything to you. If you are a fan AND enjoy learning about the creative process of putting a show together-- then you're gonna love this movie(or actually like it very much since it could've given us just a tad bit more).
It's always been about MJ's music for me. This documentary is about celebrating his music & that onstage guy. It will remind why you loved Michael(dancing with guys half his age with ease). I also felt it gave the necessary spotlight to his amazing dancers, singers and band.
Stay until the last name rolls- if nothing else just because appropriately the film is dedicated to Michael's children.