I have one in BWA Seat Leon, Golf R and SLCR currently and they seem to be ok so far. I know the Golf R and SLCR should be good but we've found that in China for example, it won't work on the Golf R's there.
We've done a Scirocco R and it burned up the controller in about 5k miles.
The issues we've seen are that some cars won't even idle correctly immediately after install, some cars will burn up their standard controller in less than 50 miles and others will burn it up in 5k miles.
Instead of playing the game of who has a controller that will work, we decided to make one that we know will work for all.