Isn't it just posy-tap? Same type of adaptor you use for additional headlights?
If you really want "tune and forget" and really don't have the interest in optimising the car. I'd go with jb1/jb4 if warrenty is of concern. If not pretty much any canned tune available..
Mixed feelings really, at one side I would say that tapping into a wire and the need to read up and understand what you're reading is a significant bigger barrier to JB4 compared to JB1 that is more true plug and play with now only three connectors to plug into. On the other hand, if you're tampering with an engine, you'd better be very knowledgeable if you are going to call it optimisation. Even with JB1 one should do logging to be sure it runs all well. Things a regular consumer won't do with a canned tune.
From my perspective, the engine is already optimised out of factory, but for a diverse set of priorities. Tuning is about moving these priorities about, and true optimisation is about improving the compromise. But most tuning topics are about 'MOAR POWER' and short term $$ - and basically a gamble that it doesn't break when the car is in one's hands.
I like the JB1 because it moves within the original safety parameters and that despite the simple plug and play, I can control boost and fuelling and make a for me 'optimised' compromise that will be more conservative than anything else, but more fun for my driving. I've done different kinds of remaps on other cars before including ones that allowed me access to almost all engine parameters. And the MQB has lots of them. Few people grasp all of them, let alone how they all influence each other, short and long term. And most people haven't got a clue if a tuner could possibly have a clue. So yes, your point about a well tested tune is important.
For me, simple, adjustable and relative conservative power is more attractive to me.
With the above mindset, I should probably stop already with just the EU6 downpipe. That is really an optimisation with much improved spool, freeer revving on top, and it thermally relieves the turbo meaning it's *more* reliable, and it has an approval so legally should not affect warranty. But it cost more than a tune and gains on paper are small... so almost nobody does only that.
Stating the above not because I think you don't know what you're doing @Raven, but just to discuss so that others might perhaps find this discussion interesting.