Hello.
Detectorpro has its fans and its enemies. I'm a fan.
This is a detector that you can use at the beach or in the field. I found I didn't have to readjust it when I went from wet sand to dry. I can also use it any place I use a land detector.
It does a much better than average job discriminating out junk in my opinion. Depth is not incredible, about 6" if you use a discrimination setting of 3 or less. But it should be noted that probably 90% of all your metal targets, no matter what detector you're using, are found at a depth of 6" or less.
It is also waterproof enough that if he gets slapped by a wave at the beach, or if he gets caught in the rain, or if he drops the headphones in the water, he won't have to worry about frying the electronics in his control box.
It is also lightweight enough that he can swing it all day long and not get tired.
Is the Wader the best detector out there? No way. But you sure can do a heck of a lot worse.
Hope it helps.