This chair is functional but not very comfortable.  My daughter uses it for days when she needs to participate in school from home because of the pandemic.  The piston on the bottom is not covered, so if you adjust the chair height often, the grease is exposed.  Additionally, the arms got loose and slid down after only one week of normal use.  Not the best purchase, but not the worst either.  The chair it replaced was much nicer, though.