There are a number of bolts required to assemble it but that said it was a straight forward and just takes a little time. The chair itself so far is performing exaxtly as required. I use this chair for hours on end and so far no issues as mentioned by others. I weigh 180 though so can't speak for heavier users.
So happy with this chair. I am in this chair for 8+ hours 5 days a week and it’s super comfortable. My hips and legs no longer hurt from sitting too long. My teenage son had it put together in about an hour & had my old chair out with the trash. This chair is easy for me to adjust and headrest is a nice addition. I highly recommend purchasing this chair.