I’m a first time user and I was surprised at how effective her products are. The shampoo, conditioner, and scalp tonic leaned towards more volume, which, I was weary of, since the last thing I needed was more volume. I have Asian hair and the texture is like a coarse broom. I have tried many products but Tonya’s gave me manageable volume. My hair feels silky without feeling greasy. I, also, have grey hair coming in, especially on the top and the scalp tonic (I don’t understand the science) but, I could swear it deflects the white streak. It’s still there but it makes it softer and blends in with the rest of the hair.