I had a 250 for several years and found some cool stuff with it. Then I began to realize that it wasn't hitting quite as deep as other machine owners were reporting. So I got a Tesoro Tejon. Woo mama I got deep after that. But there were two issues with the Tejon. First, I wasn't a seasoned detectorist, second, I wasn't quite smart enough to quickly get up to speed going from the 250 to this machine with all the dials and sound nuances. It took a while. I still like the Tejon a lot but I find it to be more of a specialized relic machine and the soil were I am now chokes its abilities somewhat, or so it seems. Then I got the AT Pro. The sounds and interface were instantly recognizable so the learning curve was much shorter. I got my ATP in the fall I believe and I just ran standard mode for a while. Then once I started to clue in I almost always ran Pro Zero high sens. The ATP is now my favorite go to detector and this year I started to try out water detecting with it, with wonderful early results. I have nothing but good to say about the ATP other than that it felt (particularly when I first got it) head heavy, and it used to put my hand to sleep. I guess that I got used to it or toughened up, but this no longer seems to be an issue for me. I really, really like the AT Pro.