Shifters are a personal preference, aren't they?
I recognize those grips on the Walmart GMC Denali... the grips on the twist shifters, I mean.
Those came stock on the Sofrider V1 I have, and were the first mechanically indexed shifter
I ever used on the first recumbent bike I ever rode.
They work fine.
You know, of course, that once you integrate what you learn about how to shift gears
with how to handle and steer your bike, it's all good, right?
I mean, your legs do all the heavy lifting when steering... so with shifting, of any bobbles 'n.
wobbles creep in, they will be accommodated with your legs.
Back on topic:
My stock grip shifter finally broke after a long, hard life and I retired it permanently.
As a kid, I learned how to shift with downtube friction shifters, so that's what I defaulted to.
Now my gears are selected by the cheap, but well built, friction shifters on my drop bars.
They're not as fast or as convenient as the grip shifter, but they're more dependable.
-You know, like the difference between the old analog tech and the new digital tech.
Of course digital is better, but analog works.
Go with brifters if you can afford them.
Fingertip indexed shifting is the bomb.
-Steve