This smoothing serum from the Mark line of Avon is absolutely amazing. I have long, thick naturally wavy (kind of a grown out perm looking wave) and usually blow dry my hair with a round ceramic barrel brush. I put a little bit of the serum on my hands and mixed it into my hair. I let it set in for ten minutes or so, and blew it out! My hair looked and felt amazing! I have tried serums that cost $20 and this serum definitely worked just as well if not better. If you want smooth hair for an inexpensive price, you must try this product out!!!! Two thumbs up!