I just ordered 2 with the 6 gallon bucket over the weekend. They arrived yesterday. I havent used them yet, but was doing dry runs in the house. They are super simple to setup, not sure how anyone could say they are complicated, way easier than other systems.
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.
Not hard at all to get out, pretty easy. One mod I did with the cover with the slit for your line being so small was to take the black plug out and wrap about 4 layers of electrical tape around it to make it wider and give a little more gap. Haven’t had a fish feel me when removing the cover before setting the hook yet.