Instruct: Classify the given review into positive or negative sentiment.
Query: A pleasant surprise

Roman Polanski has made some stinkers in his day, but this 2010 release is not one of them. It's a good suspense film that never goes over the top, and that's a good thing. There's no gory violence to speak of, and mercifully, no car chase to attempt to liven things us. Instead, we get a sort of intellectual thriller in which a writer finds clues to lead hm to think something is rotten in Denmark with the former British prime minister whose boring memoir he has been hired to spice up. There are no real jolts in the twists, and the ending is poetic, not false, as some have charged. I also liked the spare soundtrack.