Review: to the cheap , graceless , hackneyed sci-fi serials of the '30s and '40s 
Sentiment: negative

Review: its leaden acting 
Sentiment: negative

Review: at some point , all this visual trickery stops being clever and devolves into flashy , vaguely silly overkill . 
Sentiment: negative

Review: are so old-fashioned 
Sentiment: negative


Review: for technical flaws to get in the way