I got this and have since bought full size products. My husband who has thick hair even uses. Besides being color safe and delivering great volume to thin hair the scalp treatment is excellent. I haven't been using long enough to see more then a few tufts of new hair growth but the treatment leaves my scalp in great condition as not being oily or overly dry. The scalp treatment I think is the key as it stimulates hair growth. I alternate the scalp treatment with others as hoping to get the thickness back in my thinning hair. The trio does give the look and feel of thicker hair.