Other reviewers have said it is the best "found footage" film they have seen, I would go beyond that and say it's the best and scariest horror film I have ever seen, by far. I definitely recommend this, if you are looking for a terrifying film then this will not disappoint.

[REC] is definitely one of the better zombie movies. The claustrophobic atmosphere was really effective.

I agree about the last part. The rest wasn't that scary.

This movie is an experience. It stands out because it has strong characterization, and a rather well orchestrated buildup. Sadly, it was also remade into the complete and utter piece of shit "quarantine". Unfortunate because I really used to scare the shit out of people with this years ago :) but now they go "oh wait I've seen this" but it was the horrid remake. In closing, if you liked "The Descent" (2005) and other modern style violent thrillers, treat yourself to this. It has a 7.6 on imdb with 56k votes for a reason.

Constant shouting, shaky camera, and very annoying main character make this movie not enjoyable to watch. Got a headache after watching this movie :( Weak sauce.