I installed these about 1000 miles ago on new tires for my 2012 Goldwing. Obviously new tires feel great no matter what brand. What I did notice was how smooth the handle bars are now. The bike feels "planted" on the road. Very steady with no harmonics. At really slow speeds you can hear the balls rolling around a little, but not annoying. Time will tell for the extended tire life. I do believe they are worth the money, the bike seems real stable, and smoother.