Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The best treatment for acne I've had in 40 years.

I have dealt with acne since I was 12, fortunately only lightly as an adult, but it is still an issue. This is the only remedy I've ever used that works and usually showing results within less than 24 hours. The best aspect is the absence of benzoyl peroxide -- meaning no more ruining of sheets, clothing towels etc. -- and it is so much more effective.