Boredom, I'd look out for that.
To be fair the one my wife ran was pretty much faultless (140bhp version) and was nice and quiet with a quality feel. Having said this that was about as far as the good bits went. The steering was awful, like a stick in blamange, the brakes over servoed but worse of all the ride was bone shaking - worse than my RS4 for context. S-Line trim she had came from the classic school of Audi sports. Remove all damping, feel and directness, replace with back braking skillz and numbness.
As a car to do lots of motorway miles in fine, outside of that I am sure a Mondeo would be a better bet and lots cheaper too.