I use it for several weeks.
I like the fast freight slipped (it hangs less) but if we put enough is sticky and viscous bi poo!
There's other models?
It's a bit expensive for what it is but as long as it lasts.
I think it's a cleaning product than anything else, especially for those who sweat a lot, it helps.
Now go see if it feeds the button, makes you better and faster? We must sell, then lie.