I have been using this Two In One Poreless Power Liquid since about two weeks and use it twice a day (morning/night). It absorbs super quickly and doesn't feel sticky. I can't say if it really reduces the sebum production but it definitely does something with my pores. I have combination to oily, acne prone and sensitive skin and I usually break out during the summer quite often but since I have been using this product, I seldom break out. My skin condition improved and in my opinion it is a very good product to use in summer. :) The smell isn't the best but it disappears within a few seconds. Highly recommended!