The 650 has what BMW calls an "inherent characteristic." If you drive in "manual" shift mode the vehicle is prone to stuttering when coming to a stop. Imagine your head bobbing back and forth like a doll on the dashboard. The vehicle is also prone to severe lunges when driving in m1 (such as you might in a parking garage looking for a spot or while moving forward in a metered freeway on ramp) and to a lesser extent in automatic. The lunges are dangerous and you must drive defensively at 4 miles per hour. BMW states the problem is with the software-it thinks the engine is stalling and the computer gives the engine throttle. BMW won't fix the problem. Stay away from this vehicle.
But for the severe problems I have noted the vehicle is fun to drive.
Fix the stutters & lunges. It is ridiculous to characterize the problems as a "characteristic" of the car.