I love KCCC, which I bought with KCKT. The KCKT is a hohum product for me: it works okay, but doesn't seem to be anything special.
I got the shampoo when I saw it in a store while visiting my mother. It worked great there, but when I got home, it turned out to be a dud with our hard water. After a few tries, I just chucked it. Life is too short.
So, long story short, I think every haircare producer wants you to use their whole product line. They may well have intended for all the products to work best together. However, that doesn't make it so for you and me. If I had to use the other products with it, I wouldn't be using KCCC, so I think they're better off having me a happy customer for that one product.
Baby Fine 3B, low porosity, normal density and elasticity
CGing since July 2008