I had to watch it a couple of times. The first time (shortly after it came out) I saw it, it surprised me, with how different it was.
The second time, I paid more attention (you should watch this w/o distractions), and the movie made more sense - or at least I was able to follow.
By the time I watched it a third time, I was explaining the movie to those watching it for the first time, and almost delighted in their confusion.
I have had a few friends for whom I would rent this movie, and all of them were perplexed - I think one asked me to turn off the movie, as her head was going to implode or something similarly catastrophic.
The movie is not for everybody - If you know how to prepare
in 10 or more ways, it's probably not for you.