This is the only over the counter acne product which I would recommend to acne sufferers. As someone who has struggled with an on again off again acne battle over the last five years, I can safely say this is the only product which has continuously worked for me.
I put the mask on at night all over my face before I go to bed sometimes if I feel like I need to, or just on problem areas. It makes little blemishes almost disappear and bigger ones come to a head much faster. It's very very good for oily skin (which I suffer from in the T zone), and has completely destroyed the blackheads on my nose :)
The mask does have a distinct odor to it, but I kind of like it, and it's not a very strong odor. The product has done so much for me that the smell just calms me down haha.
Honestly it does help to take a break from using it once in a while to let your skin breathe, and so your skin doesn't get too used to having so much extra help. I find if I stop using it for an extended length of time (a few weeks altogether), my skin breaks out...and then when I start using it again after an extended length of time...I do get an initial breakout as it pulls out the gunk from deeper under my skin. So essentially...if you have developing zits...they will come out to play sooner if you use this mask.
Overall I would absolutely recommend this product. It's Sulfur based (6%) and is the ONLY acne product I use.
Too many topical acne products can over time make your acne much worse, and cause your skin to develop wrinkles prematurely. I can say from experience that I have tried every over-the-counter treatment for acne...they all stopped working. THIS NEVER HAS :) and my skin has had a chance to recover from all the chemicals I tried pouring on it to get rid of a problem I needed to fix internally.
While it doesn't prevent hormonal acne, it sure does a great job combating the results on the surface <3
Good luck guys :)