Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great product

I started using the Nucelle Mandelic Serum 10% about two years ago and noticed a dramatic decrease in my acne. Now I have updated to the 15% and while for the initial week you do breakout heavily I have noticed that two weeks later my skin looks clear and glowing. It tends to burn a little bit when you put it on, especially if you have sensitive skin. But nothing works like it for getting rid of acne. I have tried everything, proactive, birth control, etc. This is an amazing product.