The chair has a strong chemical smell. Not sure if it's the mesh or the plastic it was wrapped in. I've had the chair for almost a week and I still smell it. I will wash with soap and water to see if it helps. If you have asthma like me it may be a trigger. If the smell doesn't bother you it's a fine chair. Easy to assemble and pretty firm.
Chair arrived promptly as promised. Delivery person was professional and helpful. Assembly instructions were clear and straightforward though I used my own Allen wrench with its actual handle (using the one supplied would have worked but taken longer). The only thing is that I was mystified by the headrest; at no position adjustment does my head come within six inches of the headrest so I'm unsure what exactly its purpose is. I'm not qualified to say whether or not the adjustable lumbar support does its job but I can say that it does feel quite comfortable.
My fiance whom this chair is for is 5'2" and this chair is perfect for her she can sit in it for an extended period of time without cramping or sweating and the headrest is positioned well for her. I on the other hand am 6'2" tall and the headrest is just barely above my shoulders and is not comfortable for me at all. Still give 4 starts though ss you do not need to install the headrest for the chair to function.
I love this chair. Although it was my son who actually put it together it appeared to be pretty easy to assemble. I appreciate the support it provides for long term use and I am so glad that I made the decision to buy.