I don't spend any time worrying about my runflat tires. I had them on a 2004 Z4, and they were fine, if a little harsher than the non-RFT. On the 535, I don't find them to be harsh, which I put down to the tires having improved over the years.

You can pretty much go as far and as fast on a RFT as you can on a temporary donut tire. If you watch the pressures and heat buildup, you can repair a RFT. I have had one flat tire in the last 10 years, (on a RFT) and I had it fixed the next day. I just don't see what all the anguish is about. But then, I am glad cars are getting better mileage these days, and I am glad they are safer. I don't like them getting heavier, but then I buy cars that aren't heavier.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue