There are many reasons why I use my Vista Cruise, and why others feel the need for one. My stock cruise has no lag at all (I adjusted it), and I still use my Vista Cruise more when not on the freeway for long stretches.
My hand cramps up. Flipping a thump is faster than setting the OEM cruise.
A bike without a CB is behind me, and I want to point at something on the road. (I hate using my foot)
I want to point at something to a likewise rider. (cute butt bending over in a cage-Who wouldn't want a peek at that???)
I feel like resting my hand on my lap for a brief time if traffic in clogged up on a back road for a minute or two?.
I need to scratch an itch and can only get at it with my right hand.
OEM cruise doesn't set at low speeds.
These are some of the things I like about it. It's way faster to flip my thump than it is to use the OEM cruise. (I don't believe in leaving the cruise button in all the time).
We all have different wants and needs and a throttle lock is just another one of those things that some find a use for,and some don't.