Very stable holder, when using either the mic stand thread, or the screw clamp attachment.
Its achilles heel is the handscrew. The countering part is made of metal and features a square profile insert, which will eventually smooth out the middle fork part made of plastic into a circle, and then the holder will not be able to hold the tilt angle. A quick fix involves carving a notch on the head of the metal bit, so that by using a coin and two hands one can still tighten the part.
Nevertheless, a good holder, considering the price.