I love LOVE this product. After towel-drying my hair, I spray it on liberally, and then blow dry and flat iron. I live in Florida where the humidity can immediately frizz out my hair, but this keeps my hair sleek and smooth (or at least as sleek as possible - sometimes you just can't defeat the humidity). My hair also feels super soft after using it, and it smells really nice - fresh and not overwhelming.
I first received this product as a Birchbox sample, and I've since purchased two bottles.