I use it! About half the time when I low poo with coco-betaine, or clarify. Sometimes I do it as a pre-poo, and put conditioner (and/or some oil) on my dry hair (sometimes I mix the condish with a little water first, or spritz my ends lightly), leave it for 5-10 mins, then shower and poo it out.

Regardless of method, I almost always poo just my scalp, then just rinse the through the rest of my hair. I only ever poo all my hair if I really need to clarify for some reason (build-up, bad ingredient that doesn't agree with my hair, etc.)
2c/3a/3b, Fine/med, Dense, high porous, & normal elas.

Lo-poo - Renpure Keratin, SMR, Giovanni SaS
clarifying - mix Johnson's H2T with low poo
Co-wash - Suave Nats. clar. or coco.
RO - GVPCB, Ion Eff. Care, TN.
LI - SMR, Cure Care, or RO
Seal - MO or Jojoba
DT - + honey, ACV, & EVOO to SM masque & GVPCB
PT - Gelatin!, CNPF
Styling - FSG, AIF, BRHG, LALS/PS, GF curl spray gel, SM Souffle/Smoothie, LOOB
Oils - MO!, EVOO, jojoba, GSO, SM Elixer, EVCO, VO5 Hairdressing