Might buy a RS6 next week looking what people have for software on their car and if they like it

Transmission chip included, programmable to stock mode, enhanced, 93 octane or 100 octane. I run it either enhanced or at 93, driven in sport mode the difference from stock is dramatic. Transmission chip keeps revs up, higher shift point. Only complaint is spending more on gas as I partially fill the tank with 100 octane to blend 93+. APR is more expensive than some others, I went with it on basis of good local shop who reps APR (Streetwerke in Palo Alto) and feedback they had on a number of installations. At 67K miles now, still solid...

dahlback since 04.... i think. but watever. not even a hick-up. no problems, faults, makes 464 hp, dayly driven.