Putting the chair back on without any help was a nightmare but that's not unusual for chair assembly. Fairly comfortable but the lowest height is a bit tall for me. I'm 5'6" so I suppose it's living up to its name "big and tall". Can't speak to the longevity since I've only had it about a week.
This chair is sturdy and the height and width are as advertized - for the tall and big. But putting the thing together was exasperating. The instructions were clear enough but you just can't get the back of the chair into place without a mighty struggle. Highly recommended to have another person to help out. Had I known I would have thought more about the $40 assembly fee. Other reviews have been critical of the material wearing out after a few years (~4) of use. I can see why that might happen. It is faux leather and feels very thin. Cracking may very well become an issue. We'll see.
Assembly instructions very good. Better if you have two people to assemble. Earlier reviewer stated do not tighten arms all the way until back is attached. Good point. I am 6 ft 2 in. seat depth could have been greater. Front edge of seat hits me mid thigh. Would have been better if front edge of seat was closer to the back of the knee. Would not buy again.