Just seen this at a horror festival (like, literally a few hours ago at the end of a very long night of other films) and was blown away at how absorbing I found the whole thing from start to finish. It's always fascinating to listen to anyone talking about any subject they are honestly passionate about, but these guys just appear to be a history of horror from 1980 to the present day in and of themselves, as well as an impressive gamut of non-horror films from the last 20 years. The directors they have worked with, the projects they have worked on, and the skill they bring to the craft are all on show in this brilliant bit of documentary filmmaking and make it worth watching whether you are interested in the craft, history, or just expanding general horror knowledge. I'm deducting one mark simply because I would have liked more detail on the evolving mix of traditional model making and CGI in new horror films even though it was touched on, as well as a bit more detail on some of their past projects that have since become genre set-pieces or examplars of the craft, but that may have made a 3hr doc and may not have been the directors intention. But besides, utterly compelling, even to someone who did not expect much and was exhausted at the viewing!