Those masks were very good a affordable. I've tried different ones (pearl, vita complex, tea tree...), they were all moisturising and brightening but they were not the best masks I've used. The material felt nice and had enough product to last 45 minutes +.
My favourite one is the tea tree one, while is brightening, hydrating and incredibly healing. When I have deep cystic acne (from stress, hormones or pollution) that I can feel very deep in my skin, I use one of those and it soothes it 80% which is crazy. I wouldn't have thought that it was possible for something to do this, but my skin is less red and itchy and it feels soothed and soft.