First off, let me say that I have tried about every high end TID machine out there in the last two years. Now, let me give my honest review of the X-TERRA 70/705. First off for relic hunting, make sure that you get the 10.5” 7.5 kHz coil for open field hunting, the stock 9" concentric coil just does not cut it. The next choice would be the 6" Double-D 18.75 kHz coil for the real trashy spots around homesteads and in yards. The X-TERRA is a really simple platform to set up and use. Just noise cancel whenever you get to a new site. I always use all metal, two tones, sensitivity as high as you can and auto tracking. The new X-TERRA 705 has an auto track offset that lets you set the ground balance either + or - but I have rarely used this feature.