I've been using an older model 2500 for fourteen months now. It's the only machine I've used, so I have nothing to compare it to.
I like that I can do a lot of my own settings. I don't tweak much but if I need to, or think I need to, it's there. I like that it has multiple discrimination modes; I can flip between any two with just a push of a button. Depth seems to be pretty good, showing large targets at 12 to 14 inches; my deepest coin was around seven. There's really no way to know if I'm missing deeper coins. I really like the display screen that indicates size and depth; saves a ton of digging.
The 2500 is kind of heavy, but after more than a year of using it I now have guns
Clipping to battery pack to my waistband makes the machine a lot lighter. My batteries last a pretty long time, going over a month with several hours of use almost every single day.
I think the processor can be slow. The machine seems to have a hard time discing out corroded small iron (TONS of it where I search) and it often can't make up its mind. I have found ways around this, but there are days when it seems to require more swinging over a target to decide. But I don't know if other machines are likewise, so take it fwiw.
Coins are easily identified. My signals on coins are steady and if they bounce it's a steady bounce, for example my LCs bounce between penny and quarter. Big huge bounces mean junk. But sometimes a good coin signal will be a piece of old rusty nail or wire. Also, the nice little coin 'bing' sound comes on junk as well as coins and sometimes coins 'boop' rather than 'bing'.
From what I've read on this forum, many machines are auditory, where you have to rely on your ears to discern targets. I feel like the 2500 is visual, with the display screen. But I haven't really explored the all metal mode, so maybe that makes a difference.
I think the 2500 is pretty easy to learn, it just takes a little bit of observation and digging everything for a while to figure it out. I'm still digging everything in the middle of the display because I haven't found any jewelry and am not gonna take the chance of passing it up. Once I find some, I'll know what it looks like on my machine. I've not searched off the farm here, and I don't think anyone who ever lived here was bling type people, so not finding it doesn't surprise me.
My machine is an older model that I bought used but I haven't had many problems with it. It didn't come with a manual or CD, but an email to Garrett fixed that right up. A couple months ago I broke the plastic nut that holds the coil on, and when I called Garrett to buy a replacement they sent me without charge. Being able to count on great customer service is wonderful.