Review: the problematic characters and overly convenient plot twists foul up shum 's good intentions . 
Sentiment: negative

Review: inventive , fun 
Sentiment: positive

Review: has n't lost his touch , bringing off a superb performance in an admittedly middling film 
Sentiment: positive

Review: it asks nothing of the audience other than to sit back and enjoy a couple of great actors hamming it up . 
Sentiment: positive


Review: the star who helped give a spark to `` chasing amy '' and `` changing lanes '' falls flat as thinking man cia agent jack ryan in this summer 's new action film , `` the sum of all fears