I have a total of 8.25 hours on it and have found clad and a silver ring. I have concentrated on finding coins in heavy trash so as to learn the sounds, etc. I am using a modified Ultimate program at 12 khz, neg disc, and full tones. I am getting much better at sifting thru trash but won't consider myself good until I both predict AND find a nickel and a gold ring. Soil here is "G. B. fail' type so that helps.
I am very happy with it and love the convenience and recovery speed. Still much to learn.