I feel in love with this product and the heat serum immediately after one use! I use the keratin smooth shampoo and conditioner before using this product, I believe it helps with better results! After using all the keratin smooth products and straightening my hair I find that it's super smooth, shiny, soft and easier to style! I love love love the way it makes my hair feel and how it protects against my heat products! I'd recommend it to anyone because it's truly an amazing product as well as the shampoo and conditioner! It also leaves my hair smelling amazing, like I could just sit and smell it all day long haha!