So the positives for this are quite numerous, its a very realistically shot and gritty story which is scare not least of which because it could really happen. The feeling throughout the movie is pretty visceral and really puts you in the position of understanding the fear this situation would evoke.
The problem is with the character writing. The characters are pretty inconsistent, its like the script writer kept forgetting which characters were supposed to be reacting to this stress by getting panicked etc and kept jumping between one character reacting by thinking things through to suddenly being the one being negative about all the options and another character being the thoughtful one. At the start of the movie one of the women is constantly panicking (understandable) and the other is a forceful character and then half way through its like they switch personalities. This is pretty jarring every time it happens which spoils an otherwise very good movie. Still a pretty decent film though.
The problem is with the character writing. The characters are pretty inconsistent, its like the script writer kept forgetting which characters were supposed to be reacting to this stress by getting panicked etc and kept jumping between one character reacting by thinking things through to suddenly being the one being negative about all the options and another character being the thoughtful one. At the start of the movie one of the women is constantly panicking (understandable) and the other is a forceful character and then half way through its like they switch personalities. This is pretty jarring every time it happens which spoils an otherwise very good movie. Still a pretty decent film though.