I never knew how to blow dry ... too hard for me to hold the hair dryer in one hand, brush in the other. suddenly, I always let my hair dry on their own (untidy ...) I had the opportunity to try this product, and there was imperative need be me !! in 5 minutes, I myself do my blow-dry my hair volume and are well groomed. it is very easy to use and the result is almost as good as out of the hairdresser (my hairdresser will be less disappointed me !! ;-) I highly recommend this product