I had no problems unlike my Vorrezesenten. The installation was easy. They took 5 minutes because you looked after a quick glance exactly what to do (as opposed to installation instructions). In addition, the armrests of good quality and very stable. One can plan support (weighing 80 kg) and nothing happens when popping times against the desk. Also I had to grind anything that screws fit all without problems. From me therefore a clear recommendation and 5 star.