Been using these about 3 weeks, 1-2 masks a week. My skin looks noticeably brighter and healthier. Not just immediately after, but I mean over all. The amount of product per mask is generous. I’ll typically leave the mask on for 20 min and then rub the mask on my neck, chest, back on neck, and back of hands —and there will still be more serum on the cloth! Excellent product!!!