I've never used As I Am, so I couldn't say how this compares. However, I've got hair that's finer than a lot of babies do, and I use VO5 Herbal Escapes Kiwi-Lime Squeeze Conditioner to co-wash. It's super cheap and does a terrific job.

Baby Fine 3B, low porosity, normal density and elasticity
CGing since July 2008