I saw it in theaters (I dont know if it was realised everyone in theaters, but it was in my area which was cool). And then I bought it. It isn't a great movie, and it certainly doesn't depict wrestling in a favorable light, but it is quite honest. I goes into Jake's personal problems and Terry Funk's health problems more then anything else. There is a large chunk devoted to Rock/Mankind Royal Rumble 99 match, but other then that it doesn't do too much on either of them.
Worth a viewing. I onl bought it because it was on sale.