Wake me up when someone who knows the detectors involved tests the SDC against a TDI SL, AN ATX with the 8" mono coil and a GoldBug 2. JP in OZ clearly prefers it to the ATX, but his level of trouble with the ATX falsing doesn't seem to be replicated by folks here in North America. NOTE I have just been reminded that a previous US reviewer had clearly noted the falsing issue. I had an ATX and used it with the coil cover. I had very little falsing, but it may vary greatly with ground conditions or there may be variation from detector to detector.
At nearly $4000 it needs to be twice as effective as an ATX and three times as effective as the the TDI SL to be worth it.
it is also compact and waterproof but it isn't light. With batteries installed, it weighs within an ounce or two of a GPX 5000 with Doc's Gold Screamer installed.