I have used the beads in Alaska, much to my chagrin. The lodge said that it was the only way to catch trout. We caught a lot, and everyone of them had misshapen jaws and significant hook scars. Did not like it a bit, but there really was no alternative provided, even though we talked about it. I can't remember the last "gut-hooked" trout I caught. The beads are a very good imitation of what the trout are eating, but I question whether it is necessary to place the bead 2-3" away from the hook, then snag the fish.
I can't understand why some folks think a drink can is harder to carry out when it is empty than it was to carry in when it was full.