I've used the aileron heated grips for 13,500 miles.
This is one comfortable grip and the heat is welcomed here in Michigan.
The only thing that I dont like about this grip is the clutch lever hits the grip right where the chrome is on the grip and makes a noticable click.
It's also showing some wear on the spot where the lever contacts it.
I really only notice it at a standstill, like at a stoplight.
Other than that, I highly recommend them.
I haven't noticed that with mine but I'll be sure to look for a mark next time I'm out in the garage.