I've read they give the illusion of moving geese on circling birds, been thinking about getting a few to through out in the spread.
If you set them up correctly they appear, disappear and reappear
The thing for me is I don't have another trailer register every year $$$$$$...I have 10x more room in my sheds (for other decoys now

)I can carry a blind and 6doz decoys in the field in 1 trip..a simple stake punch allows you to set up in frozen fields.....and the biggest reason...I DON'T goose hunt that much anymore(other then sept season)I goose hunt in the weather like we have now mild and blue bird...If we've got weather I'd rather be duck hunting...I'd rather shoot 1 duck then 100 geese...I'm not trying to sound like a dick, but its not as rewarding anymore..We could pick anyone of our fields and at bare minium shoot a 3 man limit in under 30 mins........