The "Holy Grail" is a dopey, silly bit of silliness that is best experienced with a group of people. Preferably this group of people should have seen the movie before and be drunk with merriment (or just drunk). Discussing your favorite line, doing lines with the movie or making fun of the movie is half the joy. When watching it by yourself it isn't nearly as good. It's a little slow to get started, they overdo some jokes and the visual quality is poor. However the "Killer Rabbit" and "Bridge of Death" are still good, even by yourself. With a good group of people, this movie is a 10, by yourself it's more like a 6.
9/10