I owned an '06 Lexus SC430 that came with RF tires and it was bouncy and jarring over bumps. I replaced them with Michelin P/S and the ride became smooth and the car handled much better. I also replaced the Dunlops (non-RF) with Michelin Pilot Super Sports on my '13 GS F Sport and saw a noticeable difference in handling and comfort.
The runflats on the BMWs were actually the reason I went with my Audi S5. Drove a 335is with runflats and hated the ride. Even if I lease I will trade out the tires.
'13 Infiniti G37 Convertible, Platinum Graphite, Graphite, Premium
'15 Audi S5 Coupe, Florett Silver, Graphite, Technology
'16 Honda Accord LX, Modern Steel/Gray