I own a Prism II and the bang for the buck is awsome. Paid it off within the first two weeks of owning it. I started out coin shooting with it then got into relic hunting with it (Civil war) over a 3 month period I've dug probibly 70 bullets, 18 buttons and nemorous other camp fire finds. I've dug bullets as small as .22 cal CW. to .68 cal. (bullets fall under the pull tab icon, buttons under the zink up to copper)
As far as coin shooting goes. It pulls them all out, including gold and silver rings. the P/P mode is awsome after alittle practice and the target id is right on. Hope this helps.