Review: ultimately , the film amounts to being lectured to by tech-geeks , if you 're up for that sort of thing . 
Sentiment: negative

Review: whole lot scarier 
Sentiment: positive

Review: subtle and richly internalized performance 
Sentiment: positive

Review: very capable nailbiter 
Sentiment: positive


Review: improvise and scream their way around this movie directionless , lacking any of the rollicking dark humor so necessary