In addition to working from home, I also fancy myself a bit of a PC gamer... so I find myself sitting at my desk a lot more than I should, to the point at which it is surely not healthy!As of this moment I have owned this chair for 8 months.The older chair I replaced with this one was somewhat similar in design, with the mesh back and somewhat-adjustable lumbar support, headrest, and armrests... but this chair takes that lumbar support to a whole new level! It was odd at first, that big spring in the back, but I quickly became accustomed to it and my back rarely ever hurts while sitting now.I initially thought the headrest was too far back, like it didn't hold my head up/forward enough, but after 8 months I can honestly say that my neck has never hurt either, something I couldn't say with my previous chair.The armrests are solid, easily adjustable, although the tops of them are not very cushy. I don't mind though as I would rather have hard armrest tops as opposed to soft, faux leather type... which crack and fall apart in a few months time.*However, the height adjustment locking mechanism of the left armrest seems to have failed, the armrest doesn't stay in a raised position. At the same time as writing this review, I have contacted the seller/support with a warranty inquiry, in hopes they will replace said armrest. I will edit/update my review once this has been resolved or not. I don't make a habit of adjusting my armrests often and usually have them in the absolute lowest position anyways, below even the lowest 'click'.**UPDATE: It only ~30 minutes to receive a response from their customer support once I submitted a message to them via Amazon, they were quick to offer replacement armrests, provided me with a tracking number as soon as it was available, and ultimately sent me a four whole new pairs of armrests! From start to finish, it took 6 days. That's pretty darn good IMO, I don't think I've ever had a warranty claim for anything, ever, go that smoothly!I was also initially worried that the headrest felt a little flimsy, but it's a headrest for a desk chair, not a headrest in a jet plane or roller coaster, it's not meant to endure excessive force. It has however held up just fine so far and I'm sure it will last for quite a while, provided I don't 'manhandle' the whole chair by the headrest nor drape anything heavy over the headrest.The gas cylinder has also not caused any issues, it holds it's position quite well, and I DO raise and lower my seat height a couple times per day!As I mentioned first, I sit a lot. I was hoping the seat cushion would last longer... but, I am what you could consider to be "the exception, not the rule". I never hold this against a chair manufacturer though as there really is no such thing as a seat cushion that lasts! I sit more than any chair was designed for, and it's literally impossible to make a seat 'cushion' that lasts. Also, I'm not a big-big man, I'm ~180lbs at best. I just sit too much.Assembly was... assembly. I honestly don't know how to rate this experience, and I don't mean to come off as arrogant, I'm just... mechanically inclined, or a "jack of all trades but master of none" types.All in all, it's a good chair, and not just a good chair because of the price.. but a good chair all around. The chair has been holding up nicely, aside from the armrest (and seat cushion, which again isn't their fault really).If I had to, I would likely buy it again! This is one of those chairs that... when it eventually comes time to be replaced, I'll have a very hard time finding an equal replacement!