i've used many perricone products and i like them all (except the make-up one), but this one produces immediate results for me. i'm young, but under tremendous stress, so i had been developing deep creases in my forehead and frown lines. i forgot i even had any of this product left, but luckily found it and it immediately evened out the lines and gave my sun damaged/melasma skin a near porcelain finish!!!!! i have been using it daily since, and will never go without again. i'm a product junkie and tempted by amazing reviews of other products. but buttom line is i cannot/should not cheat on this product. it's the best!