Well, I've posted this before, but the smallest 'nuggets' I was picking up in the Brooks range were about 1/3 GRAIN with the MXT and 6x10" coil. This was in ground that could only be effectively hunted with Minelab PI's or a CZ6a running in salt mode. Some of the pieces might have been even smaller, but I didn't bother weighing them. Another nice thing about the MXT is that the disc. mode is also super sensitive and can, quite easily, be used for nugget hunting. The Sov. GT disc. mode is basically a waste of time re. nuggets. Depth-wise, if a person is running at HyperSAT, max. sens., and with a larger DD coil (in bad ground), I doubt that there's really any VLF detector (even BBS/FBS) that would go any deeper. Maybe an F75 with the trigger kept forward would do so, though I'm not sure. What makes it so good, aside from the VSAT, is the super fast ground tracking.. it's nothing short of unreal. Especially when hunting in areas loaded with hotrocks (often reading as iron) the fast tracking and VSAT allow it to, let's say, track out a hotrock and then 'jump' back to a different ground setting without wild overshoots. It's about the only detector that I've tested which is that capable. Sure, there are machines that are more sensitive to small gold (XTerra 70/705 w. DD HF coil), but they just cant handle that kind of ground effectively. I'm not being an MXT/White's fanboy here.. just laying out my own conclusions based on experience with a number of detectors over quite the few years. ..Willy.