Patek Philippe's Thierry Stern on watch complications:

At Patek, we are really very careful about the size of the watch, the beauty of the movement, the accuracy, and how to use it. It has to be simple for you, and all these movements today, you have no risk, for example, to break them. Because very often I have seen that there are amazing movements, but if you're doing one wrong setting, the whole movement will collapse in one sense. And this is something I don't want to see with Patek.

We are still always leading for new ideas or useful ideas. They're not gimmicks; they're useful movements with useful indications. At Patek, we are not willing to play really with gadgets or gimmicks, as I say… The date is not a gimmick. It's something that you need. It's something that is very useful.

From an interview with Kristen Shirley, reporting for Forbes.