Don't like it at all, I think it looks hideous.
The new 5 series looks absolutely gorgeous
This new 6 series concept looks absolutely hideous
What's the difference between the two? If you can explicitly describe in words the difference between these two designs, it'd go a long way in helping BMW shape the future "look" of their vehicles.
I think certain areas of the 6 series coupe taken in isolation look nice and "sleek" and mean, but taken together as a whole it looks just hideous.
If you saw nothing but one of the rear tail lights up close, you might think "damn this car looks like it could be pretty sick if the body lines flow well with the design of the tail light" but nope, it doesn't actually pan out that way.