This thing does what it is supposed to do, holding a microphone firmly. It operates simple and smooth and can be fixed easily, without play. Mechanical quality is fine.
My only problem with it is that the six-sided bar cannot be fixed safely under any rotational angle as the fixing screw needs to be pushing against a flat side of the bar to get good grip. There are in fact only six rotational positions, which would not be a problem if it could be mounted as shown in the picture. Alas, that's the one position that is NOT possible, with the angled side of the bar pointing straight up (or straight down). I wish K&M had made the choice to bend the end of the bar in a 1/12th different direction, which would have made it far more useful. So now I use the straight end of the bar, most of the time, although when I purchased it I intended to use the other side mostly.