Like many others I bought this chair for teleworking. The instructions were clear and easy to understand with color-coded/numbered pictures. The only “problem” I had was getting the wheel into the slot. I had to rearrange a few and jam one in using a hammer but the others were pretty easy. Having had this chair for a couple of weeks I can still say it’s pretty comfortable and am happy with it. Of course it’s not good to sit in ANY chair for 12 hours a day so I just get up every hour (thanks Apple Watch) and stretch a bit just to keep my sanity.
The seat is thinly padded so you feel the bolts in your backside while you sit - pretty uncomfortable. I have the chair as a present so I don’t care too much but I’d be pretty unhappy with it if I’d bought it for myself.
I was able to assemble the chair myself by using the box as a stand. This chair appears to be well-made (although I've only had it about a week). The wheels roll easily and the seat is very comfortable. A small lever easily raises and lowers the seat to the desired height for various work surfaces. I bought it for my computer table and it fits the bill. Overall a very nice chair especially for the price.