There have been many films about doppelgängers in the past yet here it doesn’t feel like it is being used as a gimmick. This fresh and original take on the subject is mainly due to Eisenberg’s performance and the way Ayoade skillfully frames his shots to provide a sense of claustrophobia and to document the intense feelings of neuroticism that Simon experiences. Eisenberg brilliantly pulls off the tricky task of playing two separate characters who manage to both be pretty unlikable but still utterly absorbing. Whether I was cringing at Simon’s telescopic spying, a la Rear Window, or cursing James’ ill intentions, I found myself holding my breath and waiting for the inevitable downfall of Simon or James. Eisenberg delivers a convincing, if unnerving, performance that shines, particularly when Simon starts to spin out of control.