Comfortable seat. Easy to assemble
The package is reasonably heavy (23kgs). The seat is heavy (19kgs) but easy to assemble by one person. (precautions around the backrest spring: wear gloves). It could be that the direction of the armrests is not clear (but it is very easy to reverse them even after assembly).
In use, the seat is firm but comfortable, the lumbar cushion quite firm but fits the back well after a few minutes. The adjustment is easy. The castors roll very well.
In the end: I am very happy with it after a few hours of use. I recommend it.