Nothing.
Both my Saabs were economical, dependable, trouble-free and a delight to own/drive. I don't know what these other people expected, but the car is exceptionally agile, good on fuel, fast and easy to drive.
I own a 2003 Saab 9-3 Convertible. I've had a similar experience. My Saab is quiet, comfortable, reliable, and gets excellent fuel mileage. (31 mpg on a recent 750 mile trip).
I couldn't ask for a better car.
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