I used the small ones for walleye on bay of quinte instead of harness blades. Worked just fine for me.
Bigger ones are good for lake trout behind cowbells.
On the weekend we were fishing the lower niagara...but when we fish port its usually in the winter when water is ice cold, and fish hold all through the harbor out to the mouth.
The queenston launched has been paved and looks fantastic. Nice not tracking mud through the boat when tearing down. We will see how it holds up this winter.