Watch the movie for what it is, not for what you expect it to be

Rating: 10/10 (8 December 2019)

First: If you expect this movie to be "a Tarantino" movie, to be full of action or anything, please just don't watch it, you won't get it.
I watched the movie without expecting anything and also without any knowledge about the Manson murders and really like it. As you probably know "Once upon a Time..." is how fairy tales begin, not action movies or how I like it to say - movies to be enjoyed, not consumed. This is a fairy tale taking you back in time, where one had a laissez-faire style of life, everything was a bit slower and Classical Hollywood Cinema was made. Nowadays everything has to be fast and full of action or you can't satisfy the average joe who needs to consume movies to get a break from work. Most of the movies produced over the last few years aren't worth watching as they are just another superhero reboot, loaded with action or another pointless comedy without any deeper meaning, without hidden messages, without something that let's you think about the movie or a concept of it in general. That's sad and also why most of the people don't get this movie and give it a bad rating. If you like Tarantino solely for Action and Bloody movies, then you don't understand his life's work and why it is so brilliant with all it's facets, unique camera angles, hidden meaning, social criticism, ...
p.s. Maybe it's worth mentioning that I'm just 23 years old and still think like this without even being able to see pre 2000 movies at their release.