Review: at least a minimal appreciation 
Sentiment: positive

Review: this three-hour endurance test built around an hour 's worth of actual material 
Sentiment: negative

Review: its unflinching gaze a measure of faith in the future 
Sentiment: positive

Review: their often heartbreaking testimony , spoken directly into director patricio guzman 's camera , pack a powerful emotional wallop 
Sentiment: positive


Review: no chemistry or engaging charisma