I went out yesterday with my Ace 350 to a School and did great even found 3 coin spills, 1 had 3 quarters in it one had 5 pennies in it and the third had 2 nickles and a dime. today I went to the ball park and after about 1 1/2 hrs I gave up. Only found 3 cents and 2 of them was so deteriorated I just through them in the scrap bin. But the thing that drove me nuts was the Ace just went Bonkers. beep beep beep Bonk and the signals where one way. I tried making my swings from different angles Lowering the sensitivity and finally just gave up and came home, Not a enjoyable day. At the school if it rang up nickle that was what it was Today if it read nickle it was pull Tab or can slaw, and I had it in coins mode with the pull tabs notched out. I got this Ace 350 to compare to my Whites coinmaster pro, Because whichever one I liked the best would be the one I would Upgrade to. Right now Whites is in the lead, But the AT Gold sure has my attention.