hmmm...interesting. For me personally I'm going to stick with the run flats purely because the one series has no spare wheel or space to put one. I have no issue with getting my hands dirty and quickly changing a wheel if I get a puncture but I don't want the inconvenience of sitting at the side of the road waiting for recovery because I have a puncture and no spare wheel. I've heard of the cans of stuff that re-inflate and seal a punctured tyres, but I've also been with someone where they've tried to use the stuff and the can just didn't go off or do anything!