The chairs are very easily and I was afraid that they are not very stable. However, I was disabused. Load of min. 100 kg no problem. The change in the seating position was initially quite difficult, since the armrests hooked something - after several back and reconstituted it works but problems. But you should make sure that you or immediately after the delivery the screws of the chairs follow suit at regular intervals. Otherwise top price-performance ratio. We would buy the chairs again.