I randomly started getting dandruff this summer and was desperate for something to curb the flakes. My cousin, whose a cosmetologist, recommended this set to me so I got it off Amazon. I'm telling you, this is powerful stuff! I put the shampoo in, focusing on the scalp, and use one of those scalp brushes to loosen the dandruff and ensure the product gets at the source of the problem. I usually leave it in for a few minutes to do its thing. Same with the conditioner! This has decreased my flakes by 80%. I usually wash every 2-3 days. If I go any longer the dandruff returns. I love that the medicated product stops the itching. If you have specific trouble spots you can rub a little of the serum on your damp scalp. My only complaint is the strong smell. But hey, that's a better tradeoff than flakes and itches!