I copy this over from my flixster:
"This is not another average monster movie and doesn't want to be. The point of view is different and one part of what makes this movie excellent. The "monster" is more scenery and metaphor than main focus. People complaining about that they didn't see much of it didn't get it. If you go into this movie asking "what does the monster look like?", you're asking the wrong question. The events are represented from the ground level, from a first person narrative that brings about the kind of proximity you couldn't achieve otherwise. Claustrophobic imagery becomes its own character. The created camcorder illusion of this narrative also works because of the film's short run time, even though the opening sequences are actually a little too long. These first scenes are the biggest flaw here, with some minor inconsistencies
throughout. The sound design is amazing and the visual effects are flawlessly arranged and integrated into the camcorder style direction. It looks real and believable. Something missing from the recent (and rather dull) "I Am Legend" for instance. You won't find very clear close-ups here, but rather glimpses and out-of-focus shots, an absolute necessity for a genre movie like this as far as i'm concerned. This "mystery box" approach is also what makes this movie superior to - for instance - the mentioned "I Am Legend", or a movie like "The Host", which you can pretty much walk out of after the first 15 minutes. Cause nowadays (after all the monster "designs" we have seen over years, and also applying to other genres) the stimulation of imagination is far more alluring than providing a clear portrait and definite answers. The Godzilla/Blair Witch crossover concept isn't revolutionary, but the the approach is very innovative...."