I hunted them in Wisconsin but have not got a chace to use them in ND at college here. It worked so so in WI, the geese sure take a look. However, they dont decoys with the string o wings out. They tend to stick high no matter where you sit or where u place the string o wings. It's awesome, if you like sky busting, and have a 10 ga. with a lot of ammo. I would only use them in days where the geese need an extra visual.
NOTE: I did try to turn it into a huge flag decoy line with a friend. We each took a side and when the geese started looking we dropped them slowly like a flag and pole deal. That worked with decent sucess.