I have 3 remarks about this movie:

1. The movie relies on the audience knowing who was Manson and what happened to Sharon Tate. It might be common knowledge in the US but outside of it it's not. Without this knowledge the tension of waiting for a tragedy to happen dissapears.

2. The first 2h is a collage of mood setting / world building sequences that don't push the story forward. For the first 2h I wasn't looking how the story will develop but how it will start. I understand that there might be people who will enjoy this (60s yay!) - I didn't.

3. When I first watched Pulp Fiction I really was disapointed it ended so fast. With Once Upon ... I was glad it was actually over. To put it simply: I wasn't entertained (and the ending did not compensate the wait for it).