Firstly, about Squadise:The first chair arrived damaged, with a very beaten up box. A bottom bracket was bent due to the treatment of the box, which made it impossible to assemble. Squadise really went above and beyond and shipped me an entirely new chair and said I could keep the first one despite me offering to ship it back, or simply receive the piece that was damaged to save them some money. Talk about service!!! This was clearly the fault of FedEx, and I sincerely hope Squadise was able to get shipping insurance to take care of it, as I'd prefer my money go to such an honest company rather than to FedEx which is very often careless with peoples stuff.ASSEMBLY:This is not the easiest thing to assemble in the world, but it's far short of the hardest. You need to be mindful of which way the arms go on, as they only go on one way or the bolts are not long enough to assemble it. I found it's much easier to attach the arms to the back of the chair first before the base. The bolts also have very fine threading, which means they're VERY particular about the angle you attempt to screw them in, and you need to be very precise. Apart from those little issues, it's pretty self explanatory, and it took me about 1/2 an hour to get together.COMFORT:The chair is probably best for people 5'8" and up, if you're any shorter your feet may not rest flat on the ground on the lowest position which isn't great for leg circulation. I am 6'1" and 207lbs, and this chair fits me like a glove. However, the base is the bog standard hydraulic cylinder size, so you can purchase a shorter replacement cylinder and lower the chair down if it's too high for you.CONCLUSION:My back is kind of garbage because I spend a lot of time sitting down, as I work in IT, and after a few hours of sitting in this chair my back feels better than it did before I sat down. It really encourages good posture, and unlike other "posture" chairs, this one feels much more natural and not like it's forcing you to sit correctly. For the price, I'm very satisfied, as the chairs I looked at locally were $200+ for the same quality of material, and most were not as comfortable as this until you were looking in the $300+ range. Overall I'm happy with my purchase, and very happy with Squadise!