well yeah..self-explanatory title..um well i have moderate (only during my periods) acne and mild acne so differin worked in like 2-3 weeks. and i put it in the morning and at night even though it says only to put it once. but i do twice, which seems to be working faster. my forehead is 98% clear and also the area around my nose. so yeah i recommend it for mild/moderate acne!!