The Prizm III is not a bad detector, I just found 2 CW buttons with it the other day. You have to learn how to use the machine. Always use it at maximum strength, thats the only way for it to detect deep. Also, I get some false readings with it, that happens alot if you bang it on the ground or hit stiff grass. If you get a reading and you dig and nothing is there, mostly likely it is still in the hole. Dig another inch down and you'll probably find it. Keep the detector low and level and it will work the best.