You'll find this subject has been discussed a number of times eg
here...and
here
..however I drove it as the looks initially appealed to me as well when making a buying decision on the E70.
First thing I noticed was that it was vague in the steering on a straight road, meaning it needed constant corrections. The salesman informed me that upgrading to the top of the line suspension would overcome that... NAFFFF!! I knew it would drive me nuts and be tiring on a long drive.
When I looked at it, I kind of saw that the styling is great when comparing to E53, but IMO looks dated up against the E70.
I loved the driver seating position, but the BMW comfort seats blew the RR away for comfort and ease of adjustment.
Interior space was no match, and I am not a fan of touch screen nav and functions.
The deal breaker for me is handling, and the Sport felt underpowered and overbalanced. Reminded me of driving a battleship down to the local.....
Cheers