The thing that sold me is the multiple burial function, it is super sweet.
Basically you get to a slide press the button and it does 3 sweeps in increments of 10 meters I think. After each sweep it tells you whether a beacon has been found or not, if a beacon is found during any of the sweeps an icon appears on the lower part of the display. Then you start your search and it will automatically go for the closest beacon, once that person has been found you simply depress the button and it will ignore that beacon and go for the next closest, and so forth for up to 4 beacons I believe. The advantage of this is if you are in a large group you can locate the first beacon, have your probe and shovel team come in and start to work. As they are doing you can resume your search without completey digging up that beacon and turning it off, you can already be searching for the other beacons. This IMO will save tremendous time finding the other burials.