A couple things I’ve noted…….
Depth meter sucks. It says in the manual its performance is centered around a 1” coin and smaller coins may not reflect depth correctly. Lets see……. This morning I went to a county park and mostly recovered Memorials. I did get solid hits and depth meter said deep (all five bars). Dug 7” deep hole only to find coin was 2-3” deep. Did this a few times until I started checking the top of the ground with the handheld and it vibrated (I run mine at medium sensitivity)!!! The couple times I actually got deep coins the depth meter didnt function, Ferrometer didnt function, but VDI did even tho sound was very faint. This is frustrating to some degree as it seems NM assumes we are all looking for quarters (exemption was the IH at 9” but it was pushing high VDI fof a penny). Yes, you can turn up the volume in that zone but then standby if you find a buried squished can!!!! No hearing, or at least ringing for a few minutes.
In the one area with extreme EMI I tried 4khz single frequency and pulled two quarters and one dime (all silver) in an area hit by several detectors over the years. No EMI and full 30 Sens did that!
Meanwhile I’m still learning and getting better as I understand its operating procedures. For now I would grade it A-.