Describe the driving experience in one word, and then give me some details.
Unshakable. All speeds are experienced in the same quiet isolation, and the brakes felt solid under all deceleration conditions from casual to severe. The V6 felt like it could use more low-end torque, and even engaging "Sport Mode", which adjusts shift points and makes for a more aggressive throttle, didn't really seem to make a difference. The V8 acceleration was as expected much better, but it was the type of acceleration you watch on the speedometer and not the type you feel with your senses -- and for buyers of this car, that's probably okay; comfort, luxury, and a quiet atmosphere are what their senses are generally tuned towards. We preferred the steering feel of the V8 to the V6. While both where plenty responsive, the V6 felt a little light and over-assisted to us. While the V8 had the more technically sophisticated suspension, both setups felt well-poised, and we actually got in a spot of trouble with the V6 and the suspension reacted just the way our senses hoped it would. Unshakable indeed.