Gas conversion: Which LPG system for the thickness?

Hello.

I know, I know... There are dozens of threads to it and yes, I also know how to use the search ;-) Despite that, to take up the topic again, it should be soon with mine that it should not only get ahead with petrol but also with gas. For days now I have read through various forums/info pages and am still not really smarter. Therefore, my request to those who have already made an upgrade, how satisfied are you with your equipment? Are there/are there any problems? Would you take the same facility again or choose another one?

As far as I can see, there are currently three systems to choose from:

Vialle LPI
(I don't have any information yet, if this is offered for the V8 at all)

Icom JTG

+ simpler technology, fewer components
+ Less space required in the already cramped engine compartment
+ Liquid direct injection, "newer" technology, better cooling?
- No adjustment options
- Higher price

Prins VSI

+ proven technology
+ cheaper price
+ can be set separately
- Needs more space in the engine compartment

Did I forget anything else?
After many readings it seems that no general statement can be made about which system is now the "best", but only vehicle specific. Makes sense. For example, the Icom should run very well in BMW's, but in Audi's not so round .. Is that true? I think the users here, who have already had an LPG system retrofitted, can judge this best, because (almost) every retrofitter will say anyway: "Oh, no problem!" ;-)