Gimbal professionals/users/techpeople

[Rhood]

Any people here who've had lots of different gimbals in their hands?
Especially wondering about the Letus Helix Jr., anybody any user experience? Seems hard to find reviews/experiences on the internet.
How does it compare to the newer gimbals? And in general, how do older gimbals (for instance Ronin M) compare to the newer ones?

What if you want to mount the gimbal on for instance a car, are the newer ones better at that?
Can the Letus one be screwed on to something from its platform that it sits on?

Thanks