I bought my Copper Chef from the Copper Chef online site in December of 2016 and by April of 2017 everything I cooked in the skillet was sticking, even if I used butter or oil.
I called them to take advantage of the warranty. I was told I had to send it back with a check for $29 for shipping of a new skillet, so this came to $40. I can buy a new Copper skillet for less than half that price. I went back to my All-Clad, which is over 4 years old and things still don't stick to it.
Bottom Line: No, I would not recommend this to a friend
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