Design wise, they seem to be trying to hard to rectify the wrongs of the W212's weird angular design by smoothing it out, while not making it too dramatic of a change before it gets replaced by the next generation E. The interior is spiffied up, but it is still a very staid looking design, trying too hard once again. But the specs don't lie. It will be real interesting to see where it ends up compared to the M5 and RS6.
PCD on 9/6/2011: 2011 550i, DSB, black/oyster. Prem 2, Conv, Ventilated, HUD, Sport, DHP, SAT