I bought this mask because it was on a special offer and I'm happy to say that it exceeded my expectations.
You apply it on your face as a black paste and wait as it dries and turns grey. As it dries, I could see some blackheads (that I didn't even see before) exposed. As it dries and turns grey it felt like it was also sucking the oil out.
I don't particularly have oily skin but I do get the occasional 3 or 4 pimples break out every month.
It's recommend that the mask be used 2 - 3 times a week.