Been using the F70. Had a loaner for a few days and liked it, so now I have a F70. It really loves those little charms, buttons, and little bits of metal. Got a toe ring and a 10K I think ruby ring? I turned on the AT and the first hit was 10K ring. I already have almost 200 coins using it. My count for the summer is 1090 on coins. Oh the nickles, one is a 1946 and 1964. Thanks for reading.....Z