Plot: Very simple, the film spends almost no time in explain the plot and puts the audience in the middle to find out but the slow pacing of the plot in the first half gives ample time to the audience to over think and potentially find loopholes which diminishes the experience
Acting: John Krasinski is the lead actor and the father of 2 (later 3 ) children, John does justice to his role and adds paternal instincts into his role, both kids give good performances, Emily Blunt is the performance to lookout for mainly because the scenes involving her are more fast paced and Emily gives a brilliant performance to enhace the suspense.
Direction/Cinematography: Good, the direction doesn't add to the emotions of the characters but it does justice to them and portrays them well
Sound: great sound editing, because this movie has minimal dialogue and no soundtrack (due to the requirement of the plot) ift leaves plenty of room for sound editing and it is edited brilliantly, the audience can close their eyes and listen the tension build up even though there is no background score.
I give this movie 3.5/5
Good watch, you can see it for the refreshing plot