This is a very solid well-constructed chair. While the instructions are in fractured Chinese English, it was very easy to assemble. It is initially firm, offering good support. The first day I used it I was in a 5 hour meeting online and it served me well. The only reason I gave it 4 stars is that is doesn't go down quite low enough for me. I am somewhat heavy and 5'10" (so not really tall), and wanted a roomy chair, but my feet just touch the floor at the lowest level, so it really is for the tall as the label says.