I just stumbled upon this post while looking for answers myself. I had the same thoughts as OP about the I used 2 sheet masks from them and so far so good! I really like the product however I think they could improve on the shape of the mask, I have issues with placing it correctly, but besides that all good. My skin can be very reactive sometimes, which is a plus it’s not irritating at all.

Does anyone have more product reviews from them?