The movie has a promising start but it lacks many important ingredients for it to be anything else than an average cliched sci-fi horror wannabe flick. The main things which aren't there are effects, any resemblance of realism and any sort of lore.

When it comes to the effects, they are non-existent. The "entities" which are responsible for the whole mess are simply invisible. How convenient for the producers, they were able to save just enough money on effects to pay Sandra Bullock.

Suspension of disbelief is something which this movie struggles with. You want me to believe that a computer screen can turn you into a suicidal maniac? Fine. You want me to believe that it can turn your eyes from brown to blue? Fine. You want me to believe that Sandra Bullock can run through a thick, unfamiliar forest, blindfolded while carrying two 5 yearolds? Nope. You want me to believe you can drive a car without seeing anything but GPS in a debris filled city? Nope. There's a fine line between something being perceived as possible and something being perceived as total nonsense when it comes to sci-fi flicks. You'll be perceiving a lot of nonsense while watching this one.

Sci-fi movies of this type are fun because they present the viewer with a mysterious and interesting antagonist. The formula which works best is always the same - introduce the mysterious "aliens", show the effect these malevolent "aliens" have on human kind, introduce a solution based on our understanding of the "aliens" and finally - present the viewer with some sort of closure. This particular movie follows the formula but has a significant problem. There's absolutely no explanation for the occurring phenomenon. Most movies utilize some sort of mechanism through which they inform the viewer what these antagonists are. This kind of mechanism is severely lacking here.

If you are OK with average then I suggest you give this movie a try. If you are someone who values his time and wants to watch quality stuff then avoid this one.