This is a great buy. It was easy to assemble is well built and provides excellent support to the lower back. Not sure if lumbar support is adjustable i.e. can move up or down but I'm 5'9" and it's optimally placed by default. The angle adjustable headrest is positioned perfectly and one can lean back to contemplate with just the right support to the head. It is not height adjustable however. Experiencing very humid weather here in SoCal and the mesh seat and back allows airflow to keep cool. Arm rests are positioned supportively by default and are adjustable. They have a soft padding which makes resting elbows very comfortable. Casters are well built and it is easy to roll the chair easily. I recommend this for any office setting...I use it in my home office.