Jakob Nielsen's Alertbox: "Here are just few examples of the BMW 745i's clueless interaction design:

* Response times are incredibly slow. Each time you select something, you must wait several seconds for the next screen to appear. It's common to ridicule German engineers for their ignorance of customer needs, but no hardcore engineer should ever accept a slow computer for a high-end product. The hardware fails Geek 101. Slow response times mean that you must allocate more attention to operating the UI -- dangerous for an in-car user experience."