I'm not sure what to think of this new 5er.
Like many, I didn't like the E60 when it came out. However, it has grown on me significantly over time and through actually seeing it in person.
So, my first impressions of the F10:
It looks a little bit dull. I was expecting an evolution of the E60, but this appears to be a reversion to a more conservative style. In picture, it appears all too similar to the upcoming 7 Series. The M5 render helps out a bit, but only as much as bumpers, wheels, and skirts can.
The car definitely has some attractive lines, but the rear end just looks big. Needs slightly larger headlights and slightly smaller taillights - The outline of an E46 taillight would look better on this F10.
In non-M guise, I'd say that both the E-Class and the A6 look a bit better then the Bimmer.
The interior, I will note, looks superb.