I use the chair at the moment are one week. The structure has been designed by the technical drawing some detail-less difficult. But I was using to support the connections between the backrest and floor composed. The chair knart a little bit when I lean back or move. But it is not disturbing. The seat is in my opinion a bit narrow so my legs still touch the armrests. This is rather unpleasant because the cold metal. The armrests could use more fuel because it is not really comfortable. The backrest is pleasantly long and the leather feels good when sitting. I would recommend this chair repays each.
EDIT: 03/30/2015 A month ago, the chair is suddenly gone completely broken. First, the left back is easily torn and then three days later the right armrest. Then of course, the seat back is broken back so I only had a stool. LIFETIME exactly 2 years and I've paid a lot of money. The chair should be treated with caution.