A really good, multifunctional product. I use it principally as a spot treatment : it works very well and you can be sure that the product will last for a very long time. Despite its strange scent (due to sulfur maybe?), my blemishes in the morning are less inflamed and minimized. 

I bought this mask because I have blackheads on my nose that I have been struggling for years to improve and nothing seems to work. This mask is really good! I have been using it 3 times a week for 20 minutes and it has improved the appearance greatly. The reason for 4 stars is because it is quite expensive and I don't like the tube it is in but other than that I would definitely recommend.

I haven’t found any other mask that compares to this in terms of acne-combatting ingredients. I wanted something with sulphur, salicylic acid, AHAs and clays, and this has it all. The sulphur smell is barely noticeable and initially covered by a pleasant citrusy scent. It’s also oil-free and smooth, with no physical exfoliators (gritty pieces that scratch the skin). This tingles and cools but doesn’t burn in my experience. I can use it several times a week to help my very oily and hormonal (27, female) skin. There is a marked improvement the next day. I keep reaching for this over any other mask because it works. I also love the large 100ml size and price. Highly recommend if you struggle with blemishes.