I went to a beach that is loaded with iron but still produces lots of older goodies. I used Standard mode, iron disc 40, audio on, and set the sens at 2-3 bars. I auto ground balanced and after a few pumps, it ran smooth (forgot to see what the GB number was). I just wanted to concentrate on digging belltones, as this beach gives up old silver and wheats. At first, I was getting fooled by the belltone of big deep iron but soon discovered that the numbers would jump all over the scale. A good belltone target would lock on to a high number. I did find that I was able to get close to iron sticking out of the sand and retreive targets right next to it, which I can't do with my Excal/Sov. I ended up finding 7 silver coins, a handfull of wheats, and a 1926 class ring, nothing real deep. I got fooled by junk a number of times but that happens. Other hunters at the same site were hitting lots of targets with their Minelabs. My hunting partner used a GoldBug today and did very well. All in all it was a very good day and I had fun using something that processed targets very quickly which is a definate advantage at this site. Next time at this beach I'll try the Pro mode and take it from there. I can't say the AT Pro will replace my Minelabs but its seems like a great detector at a really great price. Now, I just have to replace those damn headphones that were sliding off my head all day......