I bought a cz-70 off of cometguy that posts on this forum. I received it 1 week ago but only got to try it once so far. I absolutly love the quick response of this detector, and as others have said, it does love nickles, though square tabs fall there also. This is my first experience with a Fisher. I own an Ace 250, a Sovereign GT and an Excaliber 1000, so this Fisher is entirely new to me. Any suggestions or comments will be welcome. I live in southern California and want to to try looking for the older coins in local parks. I have my other machines for doing the beaches, though I may try this one there just to see how it does. I'm heading to a local park as soon as I post this. It's not old, but I just want to get signals and practice with this machine to get used to the feel and sounds. I did read how important it is to correctly ground balance, so that is one of the things I am going to be working on in a few minutes. I well let you know if I like it when I get back.