I was totally surprised at how great this film.You could feel your paranoia rise as the film went on and as you gradually learned the details of the real situation.

Each character in this movie — down to the smallest one — is an individual rather than a type, prone to spontaneous changes of mood and sometimes amusing outbursts of pettiness or ill humor.

It is neither dumb nor smart enough to be fun, and spends way too much time with its boring human characters.

The film's masterful storytelling did its job. The message was clear. No need to overdo.