I didn't buy. You can google other reviews about this problem, including in English - that is, this is an objective disadvantage, and not the costs of some individual instances
Got pros:
In general, a good chair, with a grid and a bunch of settings, if not for one "but"
Got cons:
I watched it in the cabin twice - the lower edge of the backrest cuts into the lower back. Either it was necessary to take this edge below the seat, or somehow make it soft, but it is impossible to sit for a long time. See full review