Why do some people prefer Windows XP and Mac OS X over Windows Vista? After all, Vista is pretty and sleek and much more advanced than XP, and, in many areas, Mac OS X. Why is there so much love for Xbox, but none for Windows Mobile?
The answer to these questions is a mystery to most of the companies that make PCs, gadgets, consumer electronics devices and to software makers. The industry spends billions on usability testing and user interface design. Unfortunately, that money is mostly wasted.