My first bad experience with my CX9's "Control Unit" is when I tried to redial a call I've made for the first time in the car. When I was at the FM radio screen, I have to actually press 5 buttons to be able to do redial!!!! While on my wife's Hyundai (half the price of the CX9) and previous car, I just have to press the call button twice.
On my C class, when I press the call button once, it will bring up the list of last number you've dialed (like in our mobile/cell phone) and it has another button to activate the voice command. In CX9, call button is the voice command button. Weird...