We purchased this vehicle used, with 14,000 miles. Our trade was an '05 Audi S4. The CTS is way more engaging and fun to drive. The sound of the motor is incredibly intoxicating. The brakes are stellar. The steering is more precise and linear than that of the Audi, and I enjoy shifting the car myself, instead of the S4's tiptronic.
Large, easy-to-read nav/info screen; excellent climate control and seat heaters. Killer sound system. A complicated car, but everything works.
Terrible tires. Features of the car are not as integrated and seamless to use as in an Audi. Squeaks and rattles inside from cheap switchgear; not like an Audi at all! Difficult to display simple information such as fuel range, outside temp, etc. using central screen. Get rid of skip shift.