You control the Airwheel by leaning slightly forward or backward. It reacts to your body weight and instantly drive forward when you lean forward, or backward if you lean backward. There is no back and forth on the Airwheel, but it’s obviously easier to drive with your body facing forward !
It keeps itself upright by advanced computer algorithm and gyro sensors. You're only responsible for keeping it balanced sideway. Similar to riding a bicycle, this is easier when it’s in motion. Balancing while standing still is for advanced riders. The 2 wheel Q-series is easier to balance as it has two wheels which offer a wider contact area. It will also stand by itself if you step off for a moment. The X series will have to be laid down or leaned against a wall when you're not riding it.