Instruct: Classify a review into positive or negative sentiment.
Query: Surprisingly good

This one's a bit underrated, I think! Sure, after movies like Blair Witch, Open Water, and Cloverfield, documentary style horror is starting to become a cliche. But hey, how many horror films are there that DON'T borrow heavily from others? I thought Quarantine was well written, well acted, and more genuinely scary than most modern horror films, and I really enjoyed it. And I consider this a zombie movie, which I typically don't like at all. In fact, this is probably my favorite entry in that genre (after Dead Alive, of course).I can't wait to see the original Spanish version, because if it's better than this, it must be really amazing. But in the meantime, I plan on buying Quarantine, because it's definitely worth seeing again.