I have been using the No Frizz line for over a year when I flat iron. I use the complete set of shampoo, conditioner, leave-in cream and nourishing cream. The thing is it does work to prevent reversion even in high humidity BUT it only worked that well when I used it on heat-killed hair (when I flat iron bone straight at 415). AND I have to use all four of those products for it to work for me. (My hair is natural 4a, very similar to my avatar when combed out).
I have tried using it on a simple blow dry for a bantu knot-out, and it did not keep the frizz/reversion away.
So for me it only works when I use extreme heat on my hair --- which ends up simulating Jennifer Aniston's texture, hint hint!
Therefore, after repeated trials, I found that it is not worth purchasing again because my goal is not bone straight hair.