Instruct: Classify the given review into positive or negative sentiment.
Query: Does Not Work!

Coming from the biggest health nut on the planet: "Don't get fooled! This stuff simply does not work. I got bit by a thousand mosquitos and gnats, swelled up like a balloon and was praying for some deet!" I have to clarify that I am not happy leaving such a review as I expected a lot more from this product, and am quite disappointed.