In all honesty, as long as the company is established (look at forums sponsors etc) then you will get a good result.
Autowerks has a good name amongst the Porsche community, and they tend to be pretty picky.
I have Viezu on mine and I am very happy with it. I think they have a tune for it, but as others have said talk to the reps to find out if it is encrypted or not.
It comes down to personal preference and who you want to be dealing with in the end. That, and value for money. They are all pretty good products.
Audi S3. Sold
Golf R. Sold
Citroen DS3 Dsport. Sold
2016 Skoda Octavia RS Wagon.
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