The first moment when you see your work through the user’s eyes is priceless. You are confronted with so many tiny problems that somehow remained hidden, despite your best efforts. You often wish you could stop time and take your prototype back to the shop to change just a few small things. Soon enough, you can, and you will continue to refine the design … over and over again. The feedback cycle between designer and user is the beating heart of the user-friendly world.18
