works well but has a minor design flaw [SEP] i have used ionizing brushes for over years since they were first sold by sharper image the negative ions work very well to flatten the surface of the cuticle of each hair making the hair less likely to break or split and also softerthis particular brush works well but the one i received has a minor design flaw if they do not need electricity cord or batteries they are not the real deal heating elements just like heated blow drying tend to dry out your hair and make it more brittle even oily hair can get dried out brush your hair slowly to get the best result if your hair is flatter after using it and you do not like that bend over and brush it upside down to get more volume