i had run flats on my 323i exclusive,normal ride height and didnt find it harsh or hard
now part of the deal getting the 330d was me removing my rims and tyres and putting on the 330d,due to the fact it didnt have run flats on,and the car was still under motor plan which then wouldve made it null and void,bmw agreed with me
now i was expecting a more harder and harsh ride with the motorsport suspension and to be honest havent noticed a difference,feels a little bit stiffer,but not as bad as people were making it out to be.
would i still use run flats again? yes,worth every penny for me as i drive alot at night and is dangerous to stop and change tyres and if the wife drives it and gets a puncture she can also keep going until she gets home