I love Asian skin care products and have tried quite a few lines in the past few years. I have loved most of the products from The History of Whoo and Sulwhasoo but have now changed this last year to SKII and Su:m 37. I really feel they are working good on my skin. I think Su:m 37 is what I use the most but still have SKII products to use up. I find with my teenage kids that both lines have the fermented essence which have helped with their acne and redness from acne. Also I see a big improvement when they and also I use the Su:m 37 bubble detox mask. You should use it 3 times a week to notice a difference. I buy a lot of sample size Su:m 37 products from Ebay which gives you more value for your money. But I also buy full size things too. I just started using their rose cleansing stick which is fantastic. I also find using muslin/linen washcloths on my face works great. I make my own with the professional spa towels I buy and cut up to smaller washcloths. Eve Lom has good facial cleansing cloths. One thing I noticed with using Japanese/Korean skin products it that it is a multi step system which concentrates on taking care of your skin. I now only use Ohiu CC cream and do not need foundations or powders because my skin looks good.
The funny thing is my husband makes jokes on all the products I order because they come in little envelopes and the mailman always makes him sign for the packages. But the other night he said the stuff I buy must be worth it because my skin looks so nice and I do not have wrinkles. This was a big thing for him to notice.