 So far, so good. Just purchased the 1999 A6 after a lot of research, and
many test drives. Also seriously considered 5-series, C-Class MB,
ES300. The A6 got the nod bc of the balance of comfort & performance.
Interior room & comforts is very good, and shifts smoothly bw gears. Handles
curves real nice - inspires confidence. Fun to drive for a entry-level luxury 
vehicle. Only complaint is the poor gas mileage. Some do not like the exterior styling - it's a love it or hate it thing.