Yep, it was exactly as promoted, claustrophobic, nail-biting. It wasn’t annoying, it was unnerving. This movie got me very angry, not because it was a bad movie, at all. But because it was so unsettling. There were so many things that took me through loops, and questioned what the hell the protagonist was thinking. Given her situation I could see how someone could come to those decisions and the movie explains these things very well. Overall, it was a well done movie, but I never want to watch it again. Which is sad, but it gets you invested and riled. The ending could’ve been better, but other than that, very good story telling.