I have wavy to curly hair so I was excited to try this "Frizz Free" dryer. I first used it to straighten my hair with the attachment. After finishing getting my hair straight to my displeasure it was still very frizzy, I then had to use a flat iron to smooth it out. When I used the other attachment to blow dry my hair curly, that did work very well. I was quite pleased with the curly hair attachment and its performance.