I had read about this on a hair care forum, where it was recommended for fine-haired wavy and curly gals who need extra protein. I decided to try it out, and am so glad I did! After using it just once, my waves (which had been looking rather straight) curled right up, and it left my hair feeling really soft and lovely.
Several reviewers on other websites had mentioned that the smell of this could be off-putting, but I didn't find it to be too strong or odorous at all. Once applied in my hair, I couldn't smell it at all.
I also like how this plays well with other hair products. I've been experimenting by layering various brands of curl cremes and gels over it, and it doesn't flake up or act strangely at all.
As for the amount to use, I've been using two dime-sized amounts on my shoulder-length hair. I may increase the amount to make sure I really get all my hair covered. I've also just been raking it through my hair with my fingers, but I might try a comb.
If you're following the Curly Girl method of no silicone or sulfates (see {CURLY GIRL BY Massey, Lorraine(Author)}Curly Girl: The Handbook [With DVD] (Expanded)[paperback]Workman Publishing(Publisher), this product is also Curly-Girl-friendly.
Overall, this is a great everyday leave-in that gives fine hair the protein it needs. It's going on my Holy Grail list of hair products for sure!