"I really enjoy how simple the pods are to use - no guessing how much to apply, or when your supply will run out - and that they stay consistently fresh with no question of potency. I have had stubborn melasma for about 4 years, since having my first son, and the only other products that worked as well were those in the Obagi prescription line, which were very harsh, full of scary chemicals, and proved temporary in their efficacy. I've followed a mediocre-results regime of a 30% glycolic acid cream, prescription 20% azelaic acid, and vitamin C serum for about six months, and when I added DDF to the mix a few months ago, I got some definite resolution that started being noticeable is about 5-6 weeks and has continued to where I now only require a bit of tinted moisturizer to even out my coloring. AND I ALWAYS WEAR 45+ PHYSICAL SUNBLOCK! Oh, and I haven't experienced any irritation from this product (the 30% glycolic acid, on the other hand, took serious getting used to)."