I have been using this serum continuously for more than 2 weeks, and my acne scars are much much lighter, seriously. The smell is a kinda unpleasant, but I am ok with that. It works fine for dry and sensitive skin like mine. However, this serum alone cannot make a huge difference, I follow Korean 10 step skin care routine everyday for half a month, and my skin has never ever been better. This is absolutely a must-have in my skin-care routine now. Definitely recommend and will repurchase