A friend applied Cilajet 9months ago to his e90 M3 and X5. The cars "look" cleaner even if it is dirty and if there is a layer of dead bugs on the front of the car its a hell of a lot easyer in fact a breeze to clean it, just wet and wipe with a microfiber. The rims you will notice still gets brake-dust but it does not embead itself in the wheel it just wipes off. It saves in terms of ease of washing and your car shines more. I'm happy and having mine done next week
