Otherwise, to stabilize a GoPro, it will add weight in the upper part, friction bearings is too high in relation to the weight of the camera so that it remains in line during lateral movements.
The plate of the control system is a little rule of thumb, I would have preferred a worm in each direction rather than just sliding, which is less accurate.
In areas for improvement, it might block the rotation of the lower column for the counterweights are always perfectly aligned with the plate.
For the price, however it is downright correct.