I was introduced to these peels during the anniversary sale 5 years ago and I have not stopped using them. I love their 2 step system and the product is extremely effective. My skin glows, is smoother, and clearer and I love the texture. Can be strong if used twice a day but just change to 3 days a week and then increase to the level you're comfortable with. Easy to pack for travel for maintaining an excellent skincare ritual.