How does the Gesture Control in a BMW 7 Series work?

I'm looking into buying a BMW 7 Series and came across the Gesture Control feature. How does this feature work and is it worth the extra cost?

The Gesture Control in a BMW 7 Series allows you to easily control your infotainment system without having to touch anything. By using simple hand gestures, such as a point or swipe, you can control functions such as volume or navigation without taking your eyes off the road. It may seem like a cool feature, but it can become distracting if you are not familiar with the gestures and settings.

Gesture Control may seem like a futuristic technology, but it is actually quite simple. The system uses infrared sensors to track your hand movements, so make sure your hands are visible to the sensors. Also, be sure to practice using the gestures before using them while driving.