I have issues with allergies (corn, which can be found in pretty much anything..and I was positive on gluten and dairy through Enterolab) and have been using this line for many years. I CO wash with their conditioner and use it as a leave in.
Been making flax seed gel for styling product. Works well.
(I "cheat" and use Devacurl No-Poo when I feel I need a "bigger" clean (contains wheat), but I could probably get away with adding chia seeds or sugar to the conditioner and clean my scalp that way instead.)