Review: a stunning technical achievement 
Sentiment: positive

Review: a feel-good movie can still show real heart 
Sentiment: positive

Review: that it 's so not-at-all-good 
Sentiment: negative

Review: , narc takes a walking-dead , cop-flick subgenre and beats new life into it . 
Sentiment: positive


Review: casting , often resurrecting performers who rarely work in movies now ... and drawing flavorful performances from bland actors