Not tried one of those thanks for the link.
MI did a managed area trial and banned mojo type devices. Duck take for season was unchanged, goose take for large canadas significantly increased for the 3 year period. So I am skeptical about motion devices altho I like the concept. I did use a rotary wing kite with mixed results but it was a pain in the axe to keep in the air most days. Too much wind it came down. not enough wind it came down. When it stayed up it seemed to bring the birds to a shooting distance.