Actually Kerry these freestyle jigs are quite good when it comes to quality and are comparable to the butterfly jigs in size and shape. It would be interesting to give them a side by side comparison. My suspicion is in the smaller sizes the products would be comparable but that is purely speculation. My last trip I took the Bass Pro freestyle jigs and the 2 times I used them they got eat. I need to really apply them in a contentious manner.........find a rock pile with a nice showing and drop them down.
The accepted technique is to drop them to bottom and then snap the rod briskly say a foot or even 2, let them drop while reeling in some slack and pop them again etc. etc. If bottom fish were my goal I would work them up about 10ft off the bottom and start over. When you snap upward is when you hook the fish.........often on the braid you can feel them hitting it.......when ever I feel a hit I jerk but usually the fish is just there when you do hookup.........usually you never feel them eat as they hit it on the drop. When you "pop" the rod it should be much like setting a hook.......but remember with braid there is no stretch so a hard flip of the wrist will get the desired action as well as set the hook if the fish eats. Understand that the wire on the free swinging hooks are a bit thicker than say on a crank bait and although plenty sharp they will need a little authority to find purchase. Flimsy rods would make a poor jigging rod. Xtra fast action is ideal, that being a soft tip that loads quickly.
I believe the fish become infuriated with the erratic motion and become determined to catch it. Thus a different trigger for fish who may not feel like eating and spurn other offerings. In the natural world there is little mercy and creatures who are hurt and wounded become instant targets.......I believe it is an instinctual response.
I probably would not invest lots of time in one spot. If I didn't get bit quickly I would move on. Ideally a dedicated rod would be employed. Troll along, see some fish and grab the jig, drop it down for a few snaps and see what happens. No bites, set the rod down and move on. Rinse and repeat throughout the day.
My strong belief is that the larger fish can be caught this way. Big fish are often so conditioned to eating at a certain time.......and eating a certain fish and even eating a certain size fish that trolling by with a perch colored crank often does little or nothing to evoke a response. But introduce the wounded erratic frustrating piece of painted metal and the predator awakes. Must Kill! Kill! Kill!...............Come to Daddy big Girl