The 2 large pivots the post and between the two main branches have the right balance between free movement and positional stability and allow quick and convenient forward and pushing back, lifting / lowering and left / right panning of the monitor.
However, it is not succeeded, the monitor near the end head of the arm to adjust the 3 rotation possibilities so that they would have to operate without much effort. Both portrait / landscape rotation (pivot), tilt (forward / backward) and rotation left / right of the monitor to this joint head despite all my Einstellversuche remained so stiff that I refrain to make changes in daily use at this point , I leave it at once made this setting 3 degrees of freedom. For this reason, I can not forgive the full 5 points.
My criticism of the monitor near possible movements aimed first of all against the provided description, which is totally inadequate to then unequivocally identify several joint-screws each correct with the correct direction of rotation. A small adjustment also usually is not enough to determine a clear trend (heavy / smoother) (which I assume logically that a joint function generally smoother, if the associated screw is unscrewed). One has since been screw a little longer to see an effect and is less risk, possibly completely unscrew the screw, from what is urgently warned in the instructions ("leads to damage to swivel and monitor"). I can not tell you how the arm would behave with proper adjustment of all screws, because I do not dare even further unscrew the relevant adjusting screws so in my opinion.
Incidentally, I have found the Internet a detailed 18-page installation manual, which is much clearer than the supplied instructions. But even this is not yet eliminated my difficulties.