Some system operations are locked out when the car is moving faster than 3 mph. This may seem like a valid safety precaution but it also prevents the front seat passenger from using those functions which is a definite disadvantage. Voice commands do not work smoothly or reliably enough to eliminate use of the touch screen and even when using voice commands there are times when the system literally asks you to read the screen regardless of speed - such as selecting a navigation destination from a pick list. Other manufacturers display a warning about distractions while driving and then allow you to do whatever you want which seems to satisfy the lawyers and that's really all this is about. This is one facet of My Sync that should be revised.