I'm obviously biased, but it's really quick and responsive with great pick-up. The engine block may be smaller but the 7-speed tiptronic is geared to deliver maximum torque in all gears and that is really obvious when driving it. It's definitely faster than my BMW 7-series V8.
I wanted to go for the diesel originally but, once I ran the numbers, it didn't make sense economically unless I drove >18,000km per year, which won't happen. With gas prices where they are today ($8.61 per gallon in Sweden), I didn't wan to get the 4.2L petrol engine either.
Pictures of the sat nav will come!
Used it yesterday and expect to use it extensively today when we drive some 6 hours south-west to our country house.