I've had this car for seven months. So the "newness" factor is gone. However, this car is amazing! It's smooth, fast, and smooth while fast. It handles like a dream. I like the fly-by-wire throttle. The car anticipates what you want to do, and - at least for me - it's correct most of the time. But when you turn the radio off to listen to the sound of the rubber on the pavement, you'll have to get used to rattles, squeaks, and pops inside the cabin. The dash, center console, and front door panels are annoying for those who cannot tolerate rattles in a $40K luxury sedan. The real nightmare, though, is that I cannot reproduce these rattles at the dealership.
Power, handling, design, feel-good factor.
Quality control to eliminate rattles inside the cabin. (I'm curious about whether these rattles have been eliminated in the 2007 models.)