I currently use the ACE350, started with the Bounty Hunter Quick Silver. Started metal detecting about 8 months ago. I've found about 1600 coins, only a couple of silver coins. A few silver rings, no gold yet. The 350 works in dry sand at the beach, but not the wet sand. For me, I've only seem to find items about 6 inches down max (unless it's a can). A pet peeve would be that bottle caps show up as quarters, not sure if other machines do that too. I've learned to walk around the target and if it stays at quarter signal then it's usually good but it if started to bounce around as I move around the target then it's usually a bottle cap. After reading the other posts, I need to dig more foil signals and maybe get the gold rings. The built in pin-pointer is nice but it did take awhile to perfect it. IF I had the money and knew I would metal detecting a lot I would get the ATPRO or another brand that goes deeper and into wet sand but I'll stick with the ACE350 for now. Hope this helps.