I bought one back in May, a 2011 jetta dsg with 22k miles. Its deeper geared than my old 2012 6spd was, so I dont really notice the loss of power I've read about. Fuel mileage is not even close to the old car though, old one averaged about 46mpg for everyday driving, new one has never been over 41-42mpg, and my commute is about 95% highway now. This one is also noticeably louder than the '12. I theorize that part of the retune is a rather aggressive timing curve, has a healthy rattle at lower RPMS, reminds me of stacking multiple timing adding devices on a VP44 truck.
The warranty seems to be pretty good so far, although they haven't figured out what's going on with my car. It randomly has extended cranking to start, even did it when I went to pick it up from them trying to figure it out. I did get a call last week about a recall they want me to bring it in for, dont know what it is, haven't called them back yet. Would love to retune this one, but dont want to void the warranty, everything is covered to about 120k miles I think. Also the VW crowd is really stupid, they think these are top secret NASA designs or something that cannot possibly be improved upon, and the places that do tune them won't tell you what they are changing, or even show any understanding of timing in a diesel engine.
I've got a couple of threads already about this car if you want to see what been posted in them as well.
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