Rick,
I've had my GT not even a month yet, but I'm using it at every opportunity. Yes, it was, and still can be confusing to me right now; I really don't expect that to change as some things that I think "oh, that's got to be a trash item" and it turns out to be something good to find. Then other things I think "oh, that sounds pretty good" turns out to be trash. But, that's part of my learning curve, and I'm working with it, pretty much digging everything for now in order to learn. I have settled on a "starting position" for the settings in most situations, and will adjust those as I think I need to, though there is more to learn in that area too. I did find a set of P - L - T - R helicopter headphones that was used ($45.00 was a very good deal on these) locally, and that has made a big difference for me. I also got a Ron's Meter for it, and that makes a difference sometimes because my hearing can't always tell the sounds apart. But I'm finding things in some "hunted out" areas too, and it helps that others have removed a lot of the trash.
I bought my Excal and GT along with an S-5 and S-12 from one of the members here - Jim - it's like he was put there to give me the setup I have now. I got the Excal first, because if I could have only one, I wanted one I could use on land or in the water. I could never afford one before (low pay, wife, child, school, etc.), though I had read about them, and wanted to try one. When I did finally get one, I was like "hmmm.... am I gonna be able to do this?" But I had used the Excal by then too, so I wasn't completely surprised by the sounds - though the GT does sound different than the Excal.
I'm with Matthias on the sometimes digging so deep - not working sandy areas - usually dirt, often clay areas, and the depth of some of the targets exceeds 12". In those areas, if it's much deeper than that, I have to cover it back up due to my debris cloth being too small - I don't want to make a mess of the area and not be able to clean it up properly. I have made note of some of those places, in order to go back to them with a bigger digging cloth, just to see what it is that's giving me those signals.
Nickles are weird for me on the GT - sometimes, they sound way too loud to be a nickle, other times, I "know" it's a nickle, and other times, I suspect a nickle, and it might or might not be one. Silver dimes on the other hand - those and pennies are usually very consistent in sound and meter ID (so far, the penny is 177 on the meter, and silver is the same, but then again, so is some aluminum). However, the sound and the meter number, along with my "gut feeling" is what tells me to dig or not - though digging everything for now.
I can say this - it took me long enough to get a GT, and I have no intention of letting this one go! I might get a second one eventually, as I can afford it, but sell this now? Heck NO!
And, much of what told me to "go ahead and buy one" was Rick, and several other people here on Findmall. And Jim was a sheer joy to work with. When I told him I was thinking about a GT as well, he said he had one he would hold for me - when I asked what else he had, I asked him to hold the other coils for me as well. And I'm glad he was willing to do that for me - it exemplifies the way most people here seem to be; willing to help, patient, and giving of whatever information they have.
So, being as it's a real nice day out today, and I don't want to sit in front of the computer, I'm going to head out with the GT and see what I can do with it today. I have to get better about taking photos to post here though.
Thanks to you Rick, and several others here, I'm a GT junkie now.