I think it depends on what you want from them. I cowashed for six months and my hair was fine. I started using natural soap bars to cleanse and my hair was incredible, as a result. It's important to use a rinse out.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me