A few things about this machine. I visited Vourvon Electronica in Manila a few months ago and saw the machine in person but I didn't test it on anything. It looked to be very well-made. One of the employees said the medium sized coil which is about the size of the medium sized coil on the Nokta Goldenking or Makro Jeohunter 3D will penetrate down to 14 meters. If true, that's crazy depth for a coil that size that can be wielded by a single person. You probably won't be able to use it at 100% sensitivity in the Philippines because of all the mineralization. But I think with it being newer technology you can get away with 60-80% sensitivity, which still gives you extreme depth. One of my questions was can it actually produce an accurate image of a deeply buried object like it does in the video demonstrations of surface objects. So far I have yet to receive an answer from the Nokta or anyone else about this matter. If it can, obviously that's impressive and makes the machine well worth the price. I noticed recently they slashed the retail price of the machine by a whopping 40%... Its hard to say if that's a result of poor revenues or dissatisfied customers. I'd buy it tho... Its too tempting to have such a deeply penetrating coil of that size.