I love this product. I use it daily alongside the Amino Acid Conditioner, and the pair of products makes my hair feel and look AMAZING. My hair is soft, shiny, and styles easily when I wash and condition with these products. I use them everyday and find that there is no build-up (which is usually a problem for me, because my scalp is oily), but also no drying - just great hair, every day. These products make my hair clean enough to go two days between washings if I choose - something that is rare for me because of my oily scalp.
I recently tried to "save" some money by purchasing a drug store brand of shampoo that claimed to use coconut oil like this product does. I'm miserable with this other brand! It has reminded me just how great Kiehl's Amino Acid collection is, and you can bet I'm shopping here to re-stock. These products might be more expensive than some other drug store brands, but the price is worth it both in terms of quality and efficiency (I use less of these products because they work so well).
In short, I can't recommend this shampoo highly enough!