But they do rob you arrow of some velocity and really worthless.
Really? I don't currently own a bow that has one(string suppressor) on it, but am thinking of adding one. Doesn't the twin suppressors near the cam/wheel on Mathews bows do the exact same thing, stop or slow the string down? They have had them now for a few years and I have never heard anyone say anything negative. Never owned a Mathews bow so I don't have any experience with any type of suppressor.