I've had the car for 2 weeks. It just absolutely blazes. The stock wheels are beautiful and the 4x exhaust tips give it a muscle car look. Understated, but it's a gorgeous car. The interior is fantastic. Leather everywhere, great seats and the Alcantra headliner is a really nice touch. I might just be driving M5s for the rest of my life.
Power on top of power, pure V-8 acceleration, awesome handling, best interior of any car I've ever been in, big exhaust pipes, great stock wheels, can get mid-20s MPG in highway cruising.
Try to get one w/the M-audio, it has better sound than the stock DSP system. Stop-and-go highway driving can be a burden, especially if you're new to the manual like I am.