Never had a problem with my multiple sets of runflats.

I have a jack, but keep it at home in the garage for changing winter wheels.

Only time we called BMW Assist they were there in under 30 minutes. He changed a wheel (non run flat) in a torrential downpour, and then followed my wife to the tire store with the flat tire so that they didn't have to put the wet wheel in the trunk and get everything wet. Good guy.

Of course, these days, we could just drive to the tire store on our run flat tire. Much easier.

And if people have proper winter tires, not no-season tires, they are far less likely to have to call BMW Assist.

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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