I've been using the product for a couple of years now, I have VERY baby fine hair, & every kind of shampoo out there that says it would add volume weighed my hair down, except Nioxin. When I had highlights in my hair & used the one for chemically enhanced hair I didn't care for the smell, but the original don't smell bad. But the smell was never something that would keep me from buying it, for me there was a huge difference in my hair when I ran out & tried to use another product (nioxin is expensive) so I went back to Nioxin & just have to pay more.