Some things to watch for. Whenever a Hot number comes out, out comes all the nail board tests (Comparison's). Yep, pretty near any detector ever build has gone through one of these tests. Detectors costing from $250 and upwards to the thousands, never seen a video where one failed. How's that? Unless your there it's like the old shell game (finding the pea). So there are machines that are too heavy, too frail, good for fresh water only, runs great on hot soil, black sand and under power wires. Ever notice a machine comes out, no body likes the stock coil. Too large, too small, Double D or some other magic concoction. How about saying the coil is waterproof. But you got to wrap the brains in shrink wrap, and then rig a antenna from the coil to somewhere around your head. Computer updates, better have your smart phone with you unless a update comes in. How about this? Dozens of formulas combating trash, than go hunt in All Metal. Yep there's a lot to compare to when you go shopping. And yes I'm guilty of falling for some of this stuff too.