Are you claiming that the AT Pro is superior to White's MXT PRO, White's Spectra V3, Fisher F75, Fisher Goldbug Pro, Minelab X-Terra 70, GTI 2500 and Tesoro Lobo Supertrak? How about Minelab GP series and White's TDI PRO? Most of these detectors have a threshold control and some even have a salt/alkali switch, while the AT PRO is silent search only with no salt switch! That's quite an achievement, if it's actually true!