I have used Shark fin, Cannon Balls, with good results. More leaning towards Shark fin. I to had my doubts about the Rattler. Some new fangled thing for me to spend my $$$$ on. That was until I went out with some one that used them exclusively in tournament and Charter fishing. I have to say I was impressed on how they worked. So I bought one and gave it a try on one rigger, then used a Shark fin on the other. Seemed to me I caught more fish with the rattler. Then I used a Cannon Ball/ Rattler and there to was a significant difference with the Rattler. I am not trying to promote any thing here. I am just answering to a post of what works for me with Lake Trout fishing. But I do not just use the Rattler for Lake trout exclusively. As to the Midwest, I can not speak for the entire fishery, but I have seen my fair share of Rattlers hanging from riggers out in the Great Lakes. Also I have used the Rattlers out in the Pacific and done quite well. As apposed to a Cannon ball or a Shark Fin. But to each their own when it comes to fishing. Some days I stand on my left foot while keeping my right hand in the air. Mouth held just right. And all the planets aligned in the right direction, with the moon in it`s best position. Chanting COME ON FISHY`S, and still I couldn't buy a fish.