I have long, thick frizzy coarse hair and so does my daughter. If I let my hair air dry, it starts to poof out and get frizzy. I hate using flat irons because it takes me forever to use it and my patience grows short. I also hate the flat iron because I get kinks in my hair from letting it sit in one spot too long or I get my hair tangled In the closing area of the iron. For years all done is blow dry and use the round brush, which takes at lest a hour. I got this today and was so excited after seeing it on a major TV talk show as a must have for spring. My hair was already done for the day but not flat ironed. I used this at the 450 degree setting and I n 5 mins my hair was shiny, smooth and felt like half the thickness was gone! It’s amazing! So I used this in my daughters hair after school and the pictures are worth a thousand words! It only took 12 minutes to do her hair!! Apparently this is the only patented product on the market. I used a round brush in my ends because I like my hair to have some curl to it! Thank you for making a product I can use easily! Also, people complained about the side buttons but once you set a temp you desire, you can lock that temp in place!