I have had a whites DFX and a Spectra V3I and now I use an AT-Pro. I am perfectly happy with it, and while you can tell it is a little less of a machine than the whites I had, for the money, it can't be beat. It hits deep targets just fine in pro mode, and the only real difference is that it doesn't discriminate deep targets as well. I tend to dig anything deep anyways, so I could care less. All in all, a very good machine especially with the added bonus of being water proof.