Honestly? They really work that well?Never seen that particular product before, but I have the Star bar end weights and the Iso grips which eliminated my problems with numbing of my hands. I had the most problem with the throttle side, but no more.
I figured having a numb throttle hand was just something I was going to have to get used to.
If they really make that much difference then I'll be putting a set of them on my list of things to get soon!