Construction is reasonably easy all parts are marked and the hardware is specially packaged. The quality is... worth what you pay since this is a low-end price for a specialty desk chair. The adjustments are stiff and cheap and have only one or two spots not infinitely adjustable. THE HEADREST: just don't bother putting it on. It thrusts way too far forward and is not adjustable front-to-back you won't be able to sit up straight with your back against the chair back.
The chair worked out good. There was one chair I liked more (that cost more) that I didn't get because it didn't have the head reast like this one...It has helped my back though already!
The chair took 30 minutes to assemble. It is comfortable and once set up fits well into my home office environment. Two caveats. At its lowest setting it still sits up a little higher than my previous chair which means that I am now a little higher over my non-adjustable height keyboard tray than before. This is not the chair's fault so just make sure you measure your particular desk. Also I wish the arm rests were a little bit further away from the seat. This is not adjustable once you tighten the screws that mount the arm rests. It would be great if they provided an additional inch on each side as my elbows currently fall just at the outside edge of each armrest.