Me and my daughter watch the Hoover Boys and they use the AT Pro a lot. I really don't know what the big advantage of the $800 dollar machine would be besides being waterproof. The 250's we have are digital screen and have settings for any kind of metal. We have found things 15inches deep and it will easily pick up a small fragment of a .22 round at that depth. The next one we get will be another 250. My daughter can carry it all day with no complaints.
