The cinematography is great, and they have made use of some amazing physical special effects (including some especially creepy moments), avoiding the use of digital effects whenever possible. (hoopla.nu)
As an author, you might not know how to create a book trailer with digital effects which is designed to wow the audience, but there are many college students that do. (readersfavorite.com)
And never in the film did I feel like he was using digital effects just to use them to cover up for what was missing in the story. (jackasscritics.com)