I have recently acquired a 2007 BMW 118d SE Auto - the so-called ‘Efficient Dynamics’ version. Initial impressions are all positive: handling, performance, autobox, finish and particularly economy (45-50mpg) all excellent. It's not spacious, of course, but there's only two of us. The ride is firm and suits us well enough, though from reviews I had read I had expected a much harder ride, due in part to the runflat tyres. So the only real reservation or concern I had prior to purchase was not so much the ride quality but the fact that such tyres cannot be repaired and are said to have a shorter life span, and may have uneven tread wear - which together must mean greater expense than with conventional tyres. Are you able to comment?