Beautiful chairs, but a challenge to put together. However I percerveered and manged to get one together. Now I need to contact Wayfair to get more of the M6x35mm bolts for the second chair ( yes I ordered two). The instructions state that the shorter bolts are for the back and the longer ones are for the seat and bottom attachment...which I understand. But the back piece where it attaches to the side pieces is irregular and in my case only the 35mm bolts were long enough to attach the pieces together adeguently.
 I would be seriously worried for myself, family or friends to sit in these beautiful chairs with such a short bolt to anchor the back of the chair to the sides. 
But don't let that deter you for ordering these chairs. I look forward to using them for a 
long time to come.