I have been using K beauty products for just less than one year. I do the 10 step k beauty routine faithfully. Yes, I have noticed a huge difference in my skin. I have actually gotten compliments on my skin from members of my family! It was shocking, but wow, did I love it. My all time favorite products are the snail essence and the face masks of just about any kind. I could live in them. My biggest problem is sebum on my face. I have tried several products with no results at all. If anyone knows what I can use, please let me know.