There was a problem with one of the casters. It seemed to collapse. I called support and a new one is being sent out in February. That seems like a long time. I took one of the casters from my old chair and put it on. Otherwise the chair is ok.
Assembly of the chair went very well. The instructions were clear and the parts all fit nicely. The arms are adjustable enough for my comfort - I've usually resorted to removing arms but I plan to keep these on. I like the height of the back and the chair adjustments work smoothly. I wish the chair came with soft wheels for for a hardwood floor. I expect to purchase a chair pad to save my floor from damage.
Two chairs ordered at the same time arrived two days apart. On second chair a corner of the base assembly had broken through the bottom of the box but was not damaged. Assembly was relatively easy. The chair is comfortable.