Watched this last night, it felt like it needed to be longer, as it seemed to skip to another segment pretty sharply. But what is there is good. Particularly the Mick Foley section. I didn't know his family were down in the front row for that I Quit Match. That was hard to watch. I remember staying up til about 4am to watch that and going to school the next day, it was brutal then, and is even more so now by the standard of wrestling today.
For more wrestling docs, the Monday Night Wars episodes are a really good watch. Not sure where to find them other than WWE Network, which is worth taking up a free month to binge through the, The shady underhanded tactics WCW used to overcome the WWE were pretty impressive. Eric Bischoff was ruthless.
The Jake the Snake documentary is also good, but a tough watch. Him and Scott Hall have gone through some shit, but Diamond Dallas Page is one super cool guy.