It's funny how many varying opinions that there seem to be. For me, I hate the sound of a slate call. They all sound the same and I can pick them out from any other call, yet that is the most popular call. For those that say they hear the metallic sound in a copper call, then it is not a good copper call. I have made several that have had that sound and I can't stand it and try to keep from them leaving the house. The thing about copper, is that it is extremely difficult to make them sound consistently the same. When you get a good one there is no other surface that can stack up to it. I have heard several different call makers rendition of copper, and in my opinion there are a select few that can produce a quality copper call time in and time out. Like I said, it is hard to get that consistent sound out of every single pot. For me, about 3 in 5 turn out right. Maybe it is something I am doing, but I know when you have a good copper call the only thing to beat it is a box call and that would be close.