My answer would be, your not just conditioning your hair. You are cleansing and treating your hair with Wen. And for my length hair, just at my shoulders, I use about 10 pumps for each cleanse and 10 pumps in my hand isn't much more than I was using with regular shampoo and conditioner. It may sound like a lot but I squeezed almost the same amount out of a bottle of reg shampoo.
Love my Wen, Love my Animals! God Bless You All!