I am a 17yo with mild facial acne. Ok, so this stuff for me was incredibly gentle on my sensitive skin. I never had any burning sensations or anything. I started this when I was 15 and at first I didn't really see any changes in my skin. However, I felt like washing my face everyday was drying it out so I just washed it once every day. It took about a month for me to have the most amazing and smooth, clear skin. I was getting compliments all the time about how great my skin looked and it made me feel so confident. This routine for me worked until about 6 months ago when my skin just stopped being treated by it. Now I am on some stuff prescribed by my GP and I haven't had much success.