ive used em. Not as easy as it sounds though, and they only fish you will catch are pretty much the ones that hide out in the rocks. If you can chase a fish in a rock or under one you have a better chance and the more people helping u out the better. I, though, was snorkeling, if you scuba it might be easier cuz you dont have to come up for air. what they do work well for though are shrimps and crabs. i caught a mating pair of Coral Banded shrimp.