This office chair is very easy to install. The instructions were very straight forward. It took less than 15 minutes to assemble. The back support is very sturdy and curves and hugs to your back curvature. It helps maintain your posture. As for the seat itself, if you have a flat bottom you may want to add an additional seat cushion for comfort. The chair is able to move up and down but does not rock back and forth. Simple and sleek chair for a small office.