Would the car seat a guy 6'4" comfortably? Did you view the engine, was it a V8, or turbo something else? How many speeds did the transmission have? Did you drive over any bumps or pot holes in the street? And if so how did the suspension differ from your stock CTS?
This is just a sampling of the kinds of questions readers need answered in an auto review. The most that I know was the steering wheel was velvelty, and I suppose that kind of wheel would be dirty from all that sweating while driving.