This is really no place for a design watch. Yet since this Santos is mechanical and it has an interesting way to move the hand I will let it slide.
The movement of this Santos is essentially hidden behind the opaque part of the face while the hour and minute hand are attached to transparent disc. The movement is connected to those transparent disk out of your sight to give the impression that the hands are suspended in the air. This effect is quite dramatic. Even though I am not a Cartier fan I must admit I like the fact that it is mechanical and not quartz.
Almost forgot, incidentally it's limited to 120 pieces which for Cartier is very limited.