Got a nice used Tesoro Lobo ST yesterday and took a few minutes today to try it out. It was fun to use, gives a nice strong zip sound on coins, had no problems finding lower or higher conductors (nickels and dimes). It hits on the smallest of items, I would call it the Grandfather of the Compadre. I think when funds allow I am going to get a brown round or a 8"x9" concentric coil for it. Only used it for about a half hour, will report back when I get some more time with it.