Have had no problems so far.
The things I don't like about this car?
The steering is a bit vague - this can probably be attributed to too much power going through the front wheels.
The gear box could be sharper and who ever decided it was a good idea to put reverse next to first in a six speed gear box is an idiot!
Apart from the latter I can't really fault the car. The looks have been significantly improved over the old shape A3. It's not a fast car, but it is quick and provides more than enough acceleration for easy motorway overtaking. The interior, like most Audi's is excellent - simple, but elegant and well put together. The car has good space for 4 adults a fifth might be a bit of a squeeze. The boot is also large for a car of this size.
I had one for three months, very cramped, vague handling at high speed, don't do it!!!
A comment about the gearbox... you have to push down on the shifter and then way over from first... you seem to be the idiot.
I don't have one, but I'd rather have reverse over by first than by 6th. Better to miss first and hit reverse (because you're probably stopped) than to miss 6th and hit reverse (ouch!)