Nothing so far. These cars have come a long way since the 80's.
Pros:
Comfortable ride, decent fuel economy, lots of features for the money, reliable.
Cons: Handling a bit sloppy on the curves, transmission is old design from the early 90's, and does not utilize the engine's power as efficiently as it should.
I still have my Audi, but use this car for business. I am happy with my decision to buy this car due to the price ($14,400 with sunroof, traction control, and anti lock brakes when the 07's were available) and its reliability.
This is an update from the original poster. 28,200 miles with no issues other than a blown fuse (covered under warranty).
Now at 54,000 miles. No rattles or any body pieces falling off inside or outside.
Only mechanical issue was water collected in the A/C condenser, causing it to drip on the carpet on the passenger side.
Rear brakes wore out at 35k, which was disappointing as I usually get double the mileage out of brakes.
Overall this is a good car for the money.