From the Utube video's that I've seen, The AT Gold and the AT Pro seem to have very good response to gold in air tests. But, air tests and and gold in the ground are completly different. The Garrett video with the guy from Idaho nugget hunting, seems to show the AT Gold in a favorable light, but that could have been salted gold for the sake of getting good video. Until reports from real prospectors come in I won't believe company hype. Look at Fisher and the new Gold Bug fiasco. Fisher pushed the Gold Bug on to the market when it wasn't ready, then they started to updated it. There were so many versions on the market, people wern't sure if the version they got was a new version, or a newer version, or the newer new version. Fisher totally flubbed that release.