Been driving my S60 R-Design for just over a year. Great styling differentiates this car from a standard A4 or 3-Series. Motor is smooth and powerful with very little or no turbo lag. Interior is clean and comes off like a German car with a little twist. I actually use the on-dash dial pad often. It's not simply a gimmick. All in all, its a nice upgrade from my G37x but leaves me wanting just a little more. Maybe I'll consider the new Limited Edition R-Design if it isn't cost prohibitive. Update: The breaks are still horrible. Couple of distinct rattles which are well hidden.
She flies. That torque curve is unreal. After a week with the R-Spec I can say that the tight suspension handles uneven pavement better than I had expected. The cabin is very quiet and IMO the sound system is equal to the Audi with the Bang and Olufsen, as I tested the Audi and the Volvo the same day.