Imagine dining at an elegant restaurant. The waiter escorts you to your seat, you select a five-course meal and then settle in for what may be a long wait as the chef prepares your food. But, to your delight, the server instead brings out each course without delay and at the perfect moment. The food is delicious, and when you receive the bill, the cost is no more than it would be at a neighborhood diner. On your way home, you think about your surprising and pleasant visit.