'Annihilation' is uneven and has problems. As somebody who has seen her fair share of films with potentially good concepts marred by underwhelming, and in a lot of cases terrible, execution, that was refreshing.
It almost does live up to its idea, but doesn't quite. Had problems with it myself and it didn't quite match up to the brilliance of the idea, but had also a lot of admiration for its brave if imperfect execution and bold ambition. Can definitely see why 'Annihilation' has proven to be so polarising with audiences and IMDb reviewers. Also have a lot of appreciation for sci-fi/horror, Alex Garland's previous work is very interesting and Natalie Portman has given some great prior performances.
Saw 'Annihilation' because it was recommended by a friend, and also the idea was absolutely brilliant and one of the most unique for any film seen recently and the trailer showed a lot of promise.