Review: a smart and funny , albeit sometimes superficial , cautionary tale of a technology in search 
Sentiment: positive

Review: a rancorous curiosity : a movie without an apparent audience 
Sentiment: negative

Review: , the movie bogs down in insignificance , saying nothing about kennedy 's assassination and revealing nothing about the pathology it pretends to investigate . 
Sentiment: negative

Review: is so often less than the sum of its parts in today 's hollywood 
Sentiment: negative


Review: a visually compelling one