Update/edited 3 months later - the seat is tearing, the chair makes creaking noises even after I tighten, keep the tools nearby for monthly tightening! I bought lumbar & bottom cushion support to make it tolerable. Note, I work from home and sit in this chair 40+ hours per week. 

Love the chair - great value!
I worry about tearing at the stitching over time considering the material, but you get what you pay for. No instructions but figured it out after about 45 minutes lol. Attaching the arms was difficult because it has to go in at a sharp angle.   Think a little manufacturing defect there but  still got it.