I had a bit of difficulty putting one of the chairs together because a safety cap was on too tight and nearly impossible to remove
That being said the rest of the assembly wasn't too difficult.  My issue is how do you lower the chairs. I was trying to get them to the right height and to be uniform but I raised them too high. Now 
I can't lower them.  There are no directions. I wrote wayfair and the rep wrote back that he didn't know and would get back to me. Still waiting