Good concept, poorly executed.

While it doesn't offer any answers, it both thrills and makes you think.

The plot isn't so bad, but the pace of storytelling is too slow which makes people bored. Certain moments are so obvious and unnecessary for the main plot. I would've fast-forwarded those moments if it was an online streaming. The ending looks like implying a sequel, not sure if this movie will get one

One of the most extraordinary films you will see this year. Take that as you want.