I own one, and here's my own slow motion video: http://youtu.be/tQUMl9NMb8Q http://youtu.be/tQUMl9NMb8Q There shouldn't be much or any perceptible jerk. The gl

I own one, and here's my own slow motion video: http://youtu.be/tQUMl9NMb8Q http://youtu.be/tQUMl9NMb8Q There shouldn't be much or any perceptible jerk. The glide wheel never actually stops, it's just slowed down a little bit eight times per second. Accuracy is superb compared to a mechanical watch; mine has lost 3 seconds in the past ten months. I also own a vintage accutron tuning fork movement. The second hand on that ticks 300 times per second, and is visually identical to the sweep of a spring drive movement. A very cool movement, too.