I’ve used it in the past. Seldom fish on the ice anymore though.
Homemade. The homemade ones I’ve seen fall apart in cold weather. Water freezes to them and it’s game over. The ivy is made for indoor temps and no one wants to litter the ice with plastic pieces.
I think they work best on panfish. Although others have good luck with eyes.
The only time they didn’t seem to work for me was panfishing on Winni. Fish would be bitting slowly, I put down 5 strings and the fish would stop altogether.
Moved and repeated…same results. Dropped my camera down and found out that northern pike liked the weeds too.