Sorry, let me be clearer. What I may believe to be an obvious problem may not actually be a problem for customers. What may be an obvious problem for customers may not be an obvious problem for me. Intuition is often wrong.
There's no impassible wall between you and your customers. Watch a few of them use your product. If 80% of them stumble somewhere--that's an obvious problem.
It didn't take Chi-square analysis for Microsoft to notice that nobody could figure out how to start a program in Windows 95; they just sat down and watched a few people, and it was suddenly very clear that they needed a big arrow pointing to the start button.
