Bought this chair for my mom. The box weighed a lot but everything inside was securely stored to prevent damage while shipping. The chair took about an hour to assemble and only required an Allen wrench and Phillips head screw driver. I tried the chair out after I finished assembly and thought it was very comfortable and felt very sturdy. The arms on the chair also fold upwards so you can move them out of the way if they get in your way while working.
We've purchase 3 of these chairs for our call center and the staff loves them. They sit in them for up to 8 hours and they state that the chairs support their back and are quite comfortable all day long. Our staff range from small to large in body size and all find it equally as nice.
The chair must have lasted 3 weeks. About then the chair started to wobble. The clerk said 6 of this brand had been returned already due to the same problem. Avoid this chair!