There's a serious ergonomic issue with the controls, specifically the buttons... Almost all of the buttons are flush, which looks nice, but there need to be some nibbies (technical term there ;-)) for tactile feedback... like the raised nibs on the "F" and "J" keys on the home keys of your keyboard.



The nibs should be stragegically placed so that you can find other keys based on the tactile focus points.



And the buttons themselves should have bevels around them so that you can tell where each button is.



Bottom line, after a week of ownership you should be able to find every button/control on the center stack in the dark without having to take your eyes off of the road. This is not a major technical challenge, just good ergonomic design.