I assembled this chair by myself in about 40 minutes. Put it together in the middle of my living room, on my area rug. Laid out all the parts and made sure everything was there before I got started. The instructions are pretty straightforward. Only tools needed are your hands, eyes, and a hex key or allen wrench (which is included). The longest Ive had to sit in the chair is about 10 hours. It remained comfy and supportive. I took off one star because I wish it wouldnt creak so much when I tilt back a bit or lean a little to the side. Hopefully thatll go away after a while. Otherwise, I think it is sturdy and good quality.