I have one and have had them on last few boats. I don't buy into the sound reduction. I like them as they allow quick access and no tools needed to change props, get line off prop and the way they look.

Feel the same. Gimmick. And the red ones fade to pink pretty fast. Best thing to do is get a new prop and buy a lawn mower blade balancer. Balance the new prop by shaving the heavy side with a file until it’s balanced. There will be no noise then. The prop nut weight will mark the noises a little, and then the seals on the prop shaft will wear out from the added weight. Then you get to buy a new prop that is attached to a new trolling motor.