I have never gotten into a sedan and had this much fun driving it. This car combines luxury and sporty into the perfect blend. I would have never imagined paying this much for any car I would buy, but it is worth every cent. The 3 suspension settings give great control over your ride. The power is more than I will ever need (Got up to a 100 mph in a few sec. the other day without realizing it.) The fuel economy is pretty bad, but what do you expect from a car of this size with AWD and a V8. The transmission on this car is so smooth that I never know when it shifts gears. Finally, the luxury features are amazing. I highly recommend it, if you want to spend in this price range.
The smoothiness of the transmission and its shifting. Integration of everything into the COMMAND system.
The availability of BlueTooth integration with your phone should be availiable for car with this price. More standard features such as Parktronic would be nice for a car of this size (5 Series BMW has it standard). The Germans in general are a bit behind the Japanese in electronics on their cars.