This chair was moderately easy to assemble. It has been solid and comfortable after several weeks of daily use. The seat width is adequate for a large person within reason.
I got this chair late last year and should have returned it a week later. From the get-go it was creaky and somewhat unstable but it was more comfortable than my last chair so I dealt with it. Now the connecting bolt has snapped in one of the arms so I can't lean back at all without nearly falling out of the chair. Don't waste your money
Everybody has different needs for the way a chair supports them. This one supports the small of my back just right to help me sit up straighter and not "perch" on the edge of the chair.
I got this chair during a sale and for the discounted price it's pretty good! It's not an ergonomic chair so don't expect life-changing support but it's a very comfortable chair. I like that it has a full release so the chair can lean all the way back and a lock so it can't lean at all. The instructions weren't the clearest and the craftsmanship on the screws especially was a little disappointing making the chair a bit loud and clunky but it's really not that big of a deal.