OP, I too am intrigued about run flats. Never had them. I have always driven sportier stuff, recently sold my M3 to get my X5 as I needed a bigger more comfortable vehicle, and I got the Michelin Latitude ZPs when I got it.

I like the idea of a run flat. No need to make the wife get out and jack up this hippo to change a tire. My big concern is wear on the Michelin Latitude ZPs. They seem to go quick. Already thinking of replacing them with Continentals.

I do plan on rolling 2 sets of wheels. One spring/summer/early fall with run flats, and one dedicated set of winter snow tires. I had to run snows on my M3 from October to April every year, daily driven. I think the X5 would benefit greatly.

Don't let trolls like are rain on your parade. Some of us enjoy discussing tangible knowledge about these cars, and learning tricks and tips, options to code and the like. Some of us *cough* ard *cough* like to be dicks. Don't be a dick.