I recently completed a 3600 mile trip with a kaoko.
First, I am really glad that I had a throttle lock. I think it looks pretty good, if not cool on the handle bar.
It will definitely hold the throttle steady. But, is a pain to engage; say vs the old style flip-on flip-off throttle locks.
Because it a pain to turn on and off, I found myself leaving it on slightly and forcing throttle changes as needed. It is tough to make very slight changes with it engaged (due to the power of the F6). I think that wore out my arm more than having not used it at all (800 mile days).
I thought that I was going to sell it, but I've forgiven it as my arm has recovered.
If the brake away came in black (it used to), I might switch to it. The handle bar on this bike is no place for chrome.