The only disadvantage of copper is that you have to polish it from time to time. This is best made with so-called "Vienna polishing chalk" which is totally harmless to the environment and gives a beautiful shine not only to copper, but also to other metals. I use it frequently in my kitchen and I am always pleased by the result.
Anthroposophists bring copper into connection with the planet Venus. Herbs, too, should be cut with knifes with a copper blade, not with an iron blade. "Sine ferrum" was the advice of the old masters. Apart from this, it is a joy to cook and prepare meal in copper pots.