Chair was easy to put together 7 steps total. Bolts were prepackaged that corresponded to the appropriate step and allen wrench provided. Overall the chair is comfortable lots of adjustments can be done. Would recommend this to a friend coworker etc.
It's no Herman Miller Aeron but it isn't bad for the money. Bought 3 of these for my home-office two for my GF and one for myself. She didn't have any trouble with hers but I found the lumbar support to be completely uncomfortable. I had to partially disassemble the back-rest to remove the lumbar support entirely but it's good now. If you do decide the lumbar is uncomfortable I recommend removing the back from the chair first before trying to remove the plastic guard. I played hell getting those screws out while it was still attached.
This chair is well worth the money. I wont say that it's not expensive because everyone's financial situation is different but the chair is comfortable. I love the back support and the head support. I easily sit on it for about 12 hours a day. To give more insight I am currently at 221lbs and I have no issues in it. It was easy to assemble as well. Hope this helps someone.