That Slime product is similar to the M-Mobility System, right? If it can't be stored in the car, what's the point of getting one then?
Can't be used with high-performance tires? The M3, M5, M6 all are equiped with this kit and their tires most likely are high-performance oriented.
BTW, getting the M-MS for free and also going to get non-RFT tires for the winter.