I really didn’t enjoy this film. The entire story unfolds in a single location, and as the runtime continues, the quality noticeably declines; however, I will say the special effects were plentiful. Regrettably, the narrative felt like a spoof of horror movies, and the final moments only reinforced that impression. There's considerable letdown stemming from my anticipation for this film, but at least it didn’t drag on like some other horror films, and occasionally I found myself laughing because certain scenes were so absurd—you just have to marvel at what screenwriters come up with. It’s unfortunate that a potentially decent movie ended up being more of a joke.

Source on TMDB