Seat test passed. My more than 70 kg, it holds out without any squeaking sound or other gripes. The chair is not a 5-star bed, but the seams are clean, not frayed hanging around the area, and on the pipes and their attachments, there are no sharp edges or corners. The armrests are adjustable in height, so that probably can set each his ideal Elbow Pad height.
For days I would not stand sitting in this part. But for a couple of hours on a lake or beach or wherever, that can be arranged. A star deduction is available for the gruesome smell at the beginning.
Note: The included carrying case is very narrow cut. When packing the chair should be careful, otherwise your feet might (if they are first put into it) holes tear in the envelope!
Addendum:
After repeated, hours of use of camping chair on different substrates (rocky, sandy, forest floor, partly coarse gravel) can I confirm my four star rating. Since nothing wobbles, nothing breaks. Who wants to sit a bit softer, is just a small blanket or a small pillow (towel and last) place under the ass. Otherwise, I have to say that the feeling of being able to sit upright in a chair on a beautiful spot nature, is a whole new experience.