The seat height is fully adjustable and the seat back adjusts somewhat. The back is definitely adjustable, and the pneumatic seat works quite smoothly!

The chairs are easy to assemble, with instructions and the allen-key supplied. It sits very comfortably, and adjusts easily. The helpful people at 1-800-950-7262 (on the back of the instruction sheet) are so kind and patient.

This chair is so comfortable even for a person only 5 feet 5 inches tall. It's very well made and comfortable. Very comfy. My * likes it a lot.

Sturdy and will last this ole fat man a few years. It is so sturdy too! It seems substantial at this time.

Both the seat and back are thickly padded - and i don't need a lumbar pillow. It's super comfortable even when you're sitting at the computer for long periods.

The chair has raised sides on either side of the seat cushion. They have an unusually strong chemical smell that has not dissipated yet one day after assembly. Wheels are too loose and the chair rolls away when you try to sit in it.