Positives: it's a much better design than A7 or CLS Merc. So for that market I think BMW is offering a good thing. Great car, but it'll cost a fortune! And hopefully that customers are fooled into forgetting the ...
...Negative: it's not REALLY a coupe, it's profile reminds a lot of the F30 3 series.
I think BMW should have risked it and made car impractical and beautiful - as long as people in back don't hit the ceiling with heads, it would have worked.