I would first like to respond to building the chair. It can be set up without much technical knowledge. A Helping Hand is still recommended. The seat itself is optimal for me. With my 1.85 my back at the bottom is well gestütz and the headrest is sitting there where it should be. The adjustable tilt function works perfectly. The mentioned other "creak and squeak" I can not determine when movement also. Nevertheless, I have withdrawn since the images can be a star suggests a softer seat upholstery. Nevertheless, the office chair is very comfortable. From me there is therefore a strong buy recommendation.