Review: three-hour endurance test 
Sentiment: negative

Review: is a powerful , naturally dramatic piece of low-budget filmmaking 
Sentiment: positive

Review: 's stylishly directed with verve ... 
Sentiment: positive

Review: filmmaker stacy peralta has a flashy editing style that does n't always jell with sean penn 's monotone narration , but he respects the material without sentimentalizing it . 
Sentiment: positive


Review: it 's the perfect cure for insomnia .