I had an Excalibur with the adapter to fit other coils on it. Aside from the fact (in my opinion) that it's overpriced there were 2 BIG problems with it:1) hates Canadian coins (like the Sov.) and there's only so many $1 and $2 coins I'm willing to pass up. 2) terrible on small low conductors. I did in-ground side by side (only 1 detector switched on at a time) tests with the Excal., Sov., Cobra II (modified), GTI 2000, Infinium. The BBS detectorsa came in dead last and, in fact, couldn't even 'see' some of the targets regardless of sensitivity or coil. I posted the results and the howls of protest (I liken them to howls since they replies were not, for the most part, well reasoned) were "deafening". Wow.. did I ever wake up the 'trailer trash'. Anyway, they're decent detectors within their limitations and I actually liked using the Excal./Sov., just don't expect to find tiny items. On the other hand, I was up prospecting in Alaska and, through mischance, ended up using a CZ6a. Found a whole load of gold with it; nuggets down to about 2-3 grains. This was hunting in salt mode with the 10.5" coil (often in disc. mode due to iron).. the equivalent of hunting with a CZ20. ..Willy.