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

Review: a wholly unnecessary pre-credit sequence designed to give some of the characters a ` back story 
Sentiment: negative

Review: offers an intriguing what-if premise 
Sentiment: positive

Review: has a whip-smart sense of narrative bluffs . 
Sentiment: positive


Review: this bracingly truthful antidote to hollywood teenage movies that slather clearasil over the blemishes of youth captures the combustible mixture of a chafing inner loneliness and desperate grandiosity that tend to characterize puberty .