it worked excellent at the highest temperature setting [SEP] a few months back a friend of mine styled my hair with a product similar to this which cost three times the cost i was thrilled with the results and wanted one for myself but just could not see spending so much money on something that i would rarely use imagine my surprise when i found this one online for a fraction of the priceso does it work is probably all that you are concerned about in one word for a girl with extremely long straight hair this unit performed beautifully sure it takes a bit more work than a straight iron since heat is only being applied from one side as opposed to two however my hair was able to keep its bounce because of it my hair is always so stiff after a use with an iron not so with this brush i highly approve sample provided for evaluation