Why I give 4 stars?
The 5 star I could not give, because to me a handle (or similar) is missing, the one the notebook holder can maneuver (the arm). Thus one reaches to the laptop and tried to overcome the resistance of the (extremely stable) LX-Arms. In the simple pre- and retracting the fall of little consequence. But if you want to change the height, you lift slightly the notebook out of the holder. This is a bit unfortunate and could well be better solved.