"Shutter Island" starts working on us with the first musical notes under the Paramount logo s mountain, even before the film starts. They re .Critical response. Rotten Tomatoes gives the film an approval rating of based on reviews, with an average rating of . . The site s critical consensus reads, "It may not rank with Scorsese s best work, but Shutter Island s gleefully unapologetic genre thrills represent the director at his most unrestrained. .