I was actually very surprised to see the amount of footage in camera time McGregor actually had in this documentary. I initially assumed that it would be just clips of him fighting and nothing much else. But, there is a cameraman that follows McGregor throughout his early career (before the Mendes fight) and shows you what his training is like, sparring with others and his home life. What I personally found most interesting is what Conor and his trainers were like right before and after the fights. This doc gave me a real insight to how not just Conor but all UFC fighters are treated and how they behave before fights and press conferences etc.
Just some things I would have liked (didn't really take anything away from this documentary): More time with John Kavanagh and a bit more in depth into Conor's training methods etc and for the documentary to have gone up to the Eddie Alvarez fight, where he became double champ (obviously they had stopped filming after Diaz 2, but it just would have been cool to see Conor behind the scenes with two belts).
But, if you love Conor or just simply love the UFC I highly recommend as it gives fantastic insights into the lives of fighters.