Yes ride quality is excellent. You will notice it is actually much firmer than the regular 5 though so it depends on road conditions too, but I think they got the balance just right. The car does handle very well in the curves.
FOR SALE: 2013 ///M5 Individual Click for pics and info
Monte Carlo Blue, Platinum Full Individual Merino, Platinum Alcantara, Piano Black, Exec Pkg, Drivers assistance pkg, Bang and Olufsen, 20" wheels