I haven’t had the opportunity to use them either. But I’ve had enough conversations with those who will not leave the house without them in hand. Some claim, “when the place is right” they are just as important as the flasher and camera.
If you snoop and search, you will find a ton of talk around here about them. Basically, my obersvation is about 95% of the people who have purchased them, swear by them.
But again, my comprehension is that it depends on the water you are fishing. Dropping them down in a weed choked, mil-foil infested pond isn’t going to do much. But I’ve heard nothing but positive results for both pike and crappies for over 1 year on Upper Red Lake.