The assault duck flyer requires wind to work. When working it may blend in from above even though you can see the wings moving at your end. Some of the others like Knotty Duck, Whiplash etc., have a black on top white on the bottom and are connected to a cord, so when you pull it, it is the black and white flash. You can spot one or a spinner from a mile away. It definitely can gain the birds attention.
Also due note that buying one of these, may make you look just like the next spread, so your $140 investment may not meet your expectations. I would go for a knotty duck over the assault duck and maybe add a spinner or two if field hunting. If your hunting ponds or flat water rig up multiple jerk cords.