Pretty questionable customer service. I ordered an Aeron chair over a month ago and it took an extra week than estimated for it to arrive. As soon as I assembled the chair, one of the screws that holds together an armrest assembly literally broke. The screw, as far as I can tell, cannot be replaced. The only solution is a replacement armrest.
What did they do when I contacted them about it, WITH PICTURES in detail? They sent me screws for the seat back. Why? I don't know. After I contacted them again, they indeed sent me the correct screw, but no instructions on how to fix it. Granted, it can't be done anyway.
That's how bad their service is. They either don't even bother to read your complaints or are ignorant.