It's true that I have read a lot of positive review on this mask, but still didn't expect much, bcs I don't really crazy in love with Cosrx products (I tried Mucin essence and AHA/BHA toner - and they were just OK), but I was really surprised to find out that this mask is really good. For 4 days I was neglecting my skin and it started to peel off and feel coarse, so any make-up was cakey. So I did a lot of washing steps and then left this mask overnight. And now my skin feel soft and quite smooth. The skin tone was OK too, I didn't really saw any radical improvement, but I believe that it's not possible with my capillary. But still it was much more that I actually hoped for. I can't say that it was only this mask effect (I believe that 4-step of washing /cleaning water, oil, foam with brush and scrub/ impacted more), but this mask still left me with really good impression. So I really going test it more and hopefully it will be a great treat for my very sensitive and dry skin)
Extra:
Some words about the package - it's plastic and quite thin one, so it's would be great to travel with it. But it don't have this rich glass feeling of course. The cap feels like metal and sometimes I have problems to close it right. But I believe it doesn't really matter.