Review: is doing something of a public service -- shedding light on a group of extremely talented musicians who might otherwise go unnoticed and underappreciated by music fans 
Sentiment: positive

Review: might as well have come from a xerox machine rather than ( writer-director ) franc 
Sentiment: negative

Review: no wit , only 
Sentiment: negative

Review: never pushes for insights beyond the superficial tensions of the dynamic he 's dissecting 
Sentiment: negative


Review: into a laugh-free lecture