Initial impressions: The chair is better quality than I expected. The seat material is nice: feels firm but soft; better than those seats with faux leather. So far, it is comfortable even for being over 200 lb and over 6 feet tall. Many parts are sturdy metal, which is much better than plastic. The base that holds the wheels may be a form of plastic, but it is dense and feels strong; almost like metal. The chair frame appears to be a firm plastic too, but not thin, so my initial thought is it will last. It has a buffed texture [not shiny or smooth -- which to me is nice, because it makes it look and feel more solid and not cheap. The one weak point in design, in my opinion, is the cover that fits over the raising post: it feels a bit flimsy. Regardless, it probably wouldn't be noticeable to most unless they get down on the floor and squeeze it. Nevertheless, that there is a cover that raises and lowers like a telescope-- to "hide" the post, is a nice added attribute. A customer could leave the that cover off if they prefer, but I like it. I appreciate that the casters stay in place (unlike the other chair I tested: the KK Toner Round Rolling Stool, whose wheels do not stay in place). This makes it possible to lift the chair without fear of dropping casters. The casters are replaceable too, which is good. I was able to use Lifelong brand casters, instead, which are purportedly safe for hardwood and marble floors. The seat is stationary once attached. It is mostly upright [not leaning back]. Even with its mesh backing it is firm. This is not a plush, rocking chair type of product, yet it is comfortable. Instructions: As seems to be the new trend, they were mostly pictures without words. Regardless, putting the chair together was quite easy. Just make sure you doube check the front versus back of the seat -- this is important for setting the metal lift connector in place. And, don't forget to put the holding ring and washer on the screws. They add an extra screw for the connector, and an extra screw, washer, and pressure ring for the back attachment. That was a pleasant surprise; and is appreciated. The raising and lowering mechanism works well. You can sit on the chair while lowering it; it seems best to get off the chair while raiding it. It lowers to where the seat is 28 inches off the floor. It rises to 22.5". The seat is 17.5" wide x 16.25" front to back [the assembled chair is 18.5" front to back]. The back rest top to the floor is 34". The wheel base is about 20" at its widest point, before adding the wheel casters. With their standard wheels the width is about 21" to 21.5". With the Lifelong brand wheels, it will have a width of 21" to 22.5", depending on how the rotating wheel base is turned. All in all, a good experience. As I wrote, these are my initial impressions [I've only had the chair one day]. My intention is to use it daily as a dining chair. I will add to this review as time goes by [e.g., in ~ six months], to indicate how well this product does long-term and with moderately heavy use. I'd appreciate seeing more former reviewers do the same.