Well it has a two thumbs up from me and my kids! The other surprising tool was the waterproof pin-pointer. Definitely add that to your list, it really speeds up the location of those small things once you've located. I've also seen some folks cover lots of underwater area by just snorkeling with the pin-pointer, sweeping it back and forth in front of you. Haven't tried this myself yet, but may try to get out next summer like that.