Review: an immensely entertaining look at some of the unsung heroes of 20th century pop music . 
Sentiment: positive

Review: dopey dialogue and sometimes inadequate performances kill the effect 
Sentiment: negative

Review: too burdened by the actor 
Sentiment: negative

Review: is n't one moment in the film that surprises or delights 
Sentiment: negative


Review: this is not the undisputed worst boxing movie ever , but it 's certainly not a champion - the big loser is the audience .