I sat in a multitude of chairs before deciding on this one. It is incredibly comfortable with it's soft cushy back but it's upright enough that I can work efficiently at my computer for many hours per day. I love that I can flip up the arms of the chair so that it can easily slide under my desk. I also love that it fits my perfectly proportionally at my height (5'2") with my feet square on the ground and my knees square at the edge. My 11-year-old son was with me to try out chairs and he agree that this one was the most comfortable yet productive-feeling chair we tried. Like others this chair does adjust in height for taller folks and I imagine they'd appreciate the comfort of this chair as much as I do.
Comfortable relatively easy to assemble. Seating material is not leather - leather is only on sides at the top and under thigh. Thus keeping it clean in work environment will be more challenging. Assembly was a bit tricky: - 3 of 8 screws were getting stuck in the through holes of side brackets. This made it a bit more difficult to align and start threading in the screws. - Seat and Back rest needed to be pressed against each other with some persuasion so that threaded inserts align with side plastic brackets. - Leather material had to be pushed around threaded inserts so that it is out of the mounting screw way. Otherwise screw would not start threading. - 2 of 5 wheels was really hard to push in into the plastic base - 2 of 8 plastic covers to cover assembly screws were cracked. Will see how long it will last.
I sit at my desk for 7-8 hours working from home during the quarantine and this chair works great. I do not have any issues with comfort and I do not even think about the chair which is what I wanted.