It was an amazing look into the building of what would have been the best concert in history. It is not to be confused with a televised version of a concert or a full dress rehearsal. Its Michael showing what genius he puts into his show and what a dedicated professional entertainer he was. As for the people who claim to have seen body doubles, yes, in some footage, Michael looks different. The footage was taped over the course of a few months and due to the strenuous schedule, I'm sure Michael's poor body lost weight over time. Since the footage is pieced together, he is clearly skinnier in certain shots and angles, but you can tell it was still him! Give it a rest people and just enjoy the show like he would have wanted!