I have one on my bike and when goin down the highway nice place just to rest the hand. As others have said get it andif you don't like it it dosen't take long to take it off and sell it

 

I like mine so much that I put one on the left side as well. I can rest my palm on either side. The original smaller ones, not the newer contoured ones. I tried the add on ones but didn't like the look.

 

I've had one of the older rubber models on my throttle for years. Works great, and wouldn't trade it for the world.

I actually had a Throttle Rocker on the bike, and it was too large, couldn't get comfortable with it.

I was out with some friends one day, when one of them remarked that he liked it, and asked where I got it. Told him I wasn't comfortable with it, took it off and gave it to him.

He walked back to his bike, took a Throttle Boss out of his bag, and handed it to me, saying he'd had the same problem with it not fitting his hand.

Sometimes you get lucky.

 

I have the one that attaches at the end of the grip. It works great, doesn't ever get in the way and looks good.
If it does get in your way, just move your hand a little to the left.

 

I had a velcro style throttle boss on my old grips and liked it.

I put on the ISO grips with the regular throttle boss and I didn't care for how it felt on my palm; I bought the contoured model and I am very happy with them.