I'd have trouble with the polyquats in the shampoo. I find that they coat my hair and cause frizz--even when wet. (4, 7 and 10 are really bad for me.) While I'm told that they don't build up, I need to wash with a surfactant that's stronger than coco b to remove them.
The other problem with Deva is that they've been know to change ingredients and not the labels. There was a thread a few months ago about someone having a new bottle of One C that didn't work the same as her previous bottle. They did, admittedly, do this several years ago. Don't know if you can find the threads about that--pretty contentious.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; DM MiraCurls Curling Gelly; UFD Curly Magic; Shescentit LIs; Sevi conditioners; Botanical Spirits Puree, CJ Repair Me