This film was gripping and well thought out. This is Alex Garland's specialty and I didn't expect anything less. Natalie Portman's performance was very redeeming for me as I've only seen her with horrible material to work with. Every time she was being questioned about what happen in The Shimmer she seemed truly annoyed and confused.
I also loved the creativeness of The Shimmer. Something that looks beautiful and inviting that holds twisted secrets.
Didn't realize that The Lighthouse was a complete rip off of this one.