smoconnor, I've been tuned since a few months after buying my car back in October of 2011. Since then, I've had a few warranty items including my mechatronic unit replacement (DSG controller), my KESSY system, my water pump, and several oil changes. Left my car in 93 octane stage 2 mode when I dropped it off for it's free 30k oil change and service (brake fluid swap, inspections, etc). They've never brought it up. If something breaks that could be due to the tuning, I'm sure they might discuss it, but otherwise they don't seem to care. I gave the GM there a ride in my car after I was stage 1 to show him what it felt like. This isn't to say he endorses this at all, but I have been honest with them and have not had any issues. Full disclosure: I've also bought 5 VWs from them in 9 years.