I'm amazed at all the griping and complaining about the ASS feature in this thread. Y'all test drove the vehicle before purchasing/leasing... ASS was demonstrated. If ASS is such a problem, why did you buy the X1?
It took me awhile to get accustomed to it and using it has become second nature for me. As Mullini mentions above, If I know I need to accelerate briskly from a stop, modulating the brake ever so slightly disables ASS.