Many people, myself included, do find the AT Pro to be pleasant to listen to, but it's not the powerhouse like the Tejon. The ATP is not a bad detector, but it like the Tejon has troubles with falsing in bad soil, and they both lose a lot of depth under those conditions. The Tejon though, is the deepest detecting single or multi-freq VLF machine I've ever owned, seen, or had in my hot hands, noisy as all heck too sometimes though, and not a good one for the iron belt. Mine was a bit deeper than most, and I could air test a clad nickel at 16-17 inches and a clad dime at 14-15. That won't happen with the ATP. Unlike Sandman's Sovereign, mine was pretty much a match for depth, but the Sov could handle some really nasty, nasty uncommon soil very well, especially basalt. Both the ATP and the Tejon can find some very small metal objects, but the ATP has a slight edge on BB sized ones. For salt beaches the ATP, and (especially) the CZ21 and Sov GT are the overall best. For open fields in light-to-moderate Fe soil, go with the Tejon, it is an absolute BEAST there, and deeper than an Explorer II or F75 LTD. On anther note, the Vaquero works a bit better on salt beaches than the Tejon, and is much more peaceful and quiet without masking too many targets. It almost gets the same depth as the Tejon too and sometimes beats it because of its frequency and its lower gain and sensitivity.
*I might add that I did an unusual test one day. I matched a cz against a Sov, against a Tejon and a Compass Goldscanner Pro on a high black sand/salt beach. The cz won by two inches, all the others were the same for depth. So I took soil samples home with me, so of course all soil strata had been disturbed. The Compass went the deepest, the CZ next, and the Sov and Tejon both came in at #3 with less depth. Our Oregon inland soil is ofen some really nasty stuff..and can easily be different just a block away from the last place we searched inland.The same goes for our high black sand salt beaches too..