I used this product on my wavy hair and also on my daughters tight curly hair.I used the brush for volume on my hair and the attachment for straightening on my daughters. I Loved the volume that I got by using it on my hair , and it did straighten my daughters but it did take awhile. Our hair was not as frizzy as it usually is when drying. So, I will be using this product more often to get the results that we got.