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.
I have only been using the chair for just over a week and it usually takes me a month or more to decide if I like a chair. The only thing I wish it had is that the seat itself could be adjusted forward or back. I have one at home that does that but could not find one like it anywhere. I don't think that is a deal breaker though. However up to now I am liking it it is definitely more comfortable than my old chair and all the chairs in my office. I have played musical chairs with them all and this one is definitely the best. I will have to come back in a couple of months and let you know if I am still liking it.
It's a fair value chair. However After having seating on it for 3 weeks. The back start squeaking and armrest paint is coming off. Every time you press your palm against the armrest your hand will have black paint residue.