The one thing I wonder about is when the flag does pop, and you go to remove the insulating foam disc, how hard is that to get out? Seems fine in the house, but outside might be a different story.
CaptainMusky- I have been using the foolers for about 3 or 4 seasons now and one thing I can say is that rather than pulling the flag disc, I typically set the hook with the disc in then remove it once I have the fish on. I personally don’t use the foam discs but just use tip up hole covers since they fold up easier and are cheaper on Black Friday, but I never seemed to have an issue setting the hook with the hole covers still covering the hole.