Also own 2000 C5 and 2003 C5 as well as the C6. The C6 is by far superior to the C5 in performance as well as design. It is a total delight to drive and deserves the many stares it garners. Once one gets used to the keyless concept the car is even more of a delight. Navigation system easily understood after the first few "tries".
Keyless system. Exterior looks, particularly the new headlamp arrangement.