I'm liking it a lot and very tempted to move back. Regarding the "iPad", my A45 has this and initially I thought it was pants but it grows on you and isn't that bad, quite modern really.
Mr Moers of AMG has stated that there will be no synthesising of engine noise in flagship AMG cars.
Is this what you were worried about, or is it simply because it's turbocharged?
It still sounds pretty fruity in all the videos I've watched.
Personally I'm not sold on the exterior. I like the new C-class in general but I feel they could have made the 63 look a bit more aggressive.
The estate gets my vote over the saloon too.