Personally, it was effective! I used it after a bath, and when I peeled off the first sheet, I didn't see much of a difference, but when I used a cotton swab, my pores were clean. The second sheet was quite moisturizing, which is nice. Especially after washing my face the next day, I thought, "My skin feels smooth and my pores are clearly less noticeable and cleaner!" However, my pores are clogged with soft white keratin plugs rather than blackheads, so it may not be as effective on hardened blackheads. I'll have to wait and see how long they stay clean.