i had one.
it worked well to let you rest your hand for a few seconds.
maybe 10-30 seconds, depending on how flat the road is and how much traffic there is.
it's worth getting the heavier throttlemeister to dampen the vibes.
I have it, it's a must if you take long trips. Riding 800 miles in one day is a walk in the park. Plus the stock bar ends look kind of ugly, and since the TM comes with both sides, it actually improves the look.
Awesome for Highway miles! They got the handlebar buzz down to a tolerable rate, they look good, and your right hand will thank you after a couple hours!
It's easy a pie to install, took me a half hour I think. I also put progrips on there so now they are soft & grippy.
Had a Throttlemeister on my FJR and it was ok, but for a two hour Saturday morning ride through the hills it wasn't worth it, imo. Longer trips, yes, but not for general use. I now use a Crampbuster which is simple and works well to take the wrist pressure off. Try one for $11 before investing in the pricey TM.
I have had Throttlemeister's on several bikes but have now moved on the the Kaoko throttle lock.
The only issue I have had with the throttlemeister is that is is slick when trying to operate it with your gloved little finger. Some anti slip tape works great BUT the Kaoko is the way to go. IMHO