Director: Derek Cainfrance Starring: Ryan Gosling, Bradley Cooper, Eva Mendes, Ray Liotta, Ben Mendelsohn, Rose Byrne. Written by Derek Cainfrance, Ben Coccio and Darius Marden Running Time: 140 mins Cert: 15 Release date: 12th April 2013 Some reviews are very hard to write because you don’t want to give too much away and yet you…