I have Servotronic on my '05 X5. I ordered it, because I do a lot of parallel parking. When stopped, and at very low speed, the steering wheel can be turned with your finger, which makes parking a breeze. As speed increases, the amount of force needed to turn the wheel is comparable to a BMW with non-servotronic steering. If you need to parallel park frequently, as I do, this is a cheap, and worthwhile option.