I really like these chairs but they are a complete pain to put together.  I am good at that kind of stuff and these take about 30 minutes each.  Have a rubber hammer handy to help alight the holes.  Also do not tighten completely before you stand the chair up and sit on it.  Here is the trick, you have to tighten while there is some weight in the chair to level it!   So by myself I laid across the chair and went underneath to tighten.  That work..but wow not fun.  With that said, I love the chairs.  The shipping was fast but almost every box was damaged.  I had one with a broken leg which will have to be returned for a replacemetn.