"Like "28 Days Later," this is a film in awe of its creations, eager to unleash them into a world that lacks the glitz and polish of a supernatural thriller and focused in the intent to expand their visage into one of remarkable believability. There are moments here when we are not just staring back at movie villains or even watching on with misplaced hope at the antics of a cluster of desperate survivors. If a good horror picture means to transport us into the fabric of its bleak narrative and imprison us there, then here is one of those rare movies that penetrates the membrane separating all those disposable "gotcha" scarefests from genuinely engrossing supernatural thrillers, and finds a resonating chord." - David Keyes, Cinemaphile