For the whole car?
dalgleish it's like if you fit a none VW phone kit to your car. Any thing you touch head unit, wiring loom etc... you invalidate your warranty. So it's ONLY engine gear box etc not hole car. They told me that if I had a problem and VW refused to touch any part of car due to mods it was covered with there warranty. However if any thing happens with engine/gear box I was told to take it straight to morego and they will sort it.
I defiantly don't thrash the car as much now coz if you accelerate steadily (shifting @ 4-5 k) in D by the time you get into 6 you're knocking on 100 mph. Power delivery is so smooth with less lag, DSG shifts faster, plus there is power right to the red line. Just ran in the AP 4 pots so the skin is pulled off my face in both directions now. Just waiting for a fancier diff now.
It's true that there are a lot of potential draw backs to modding your car but you end up with a unique car to you. Best thing about the 250 is running away from smug Audi and BMW drivers who think there car's should be a lot faster.