It took my husband about 20 minutes to assemble each chair. There was some issue with the instructions dealing with the way the bars of the legs were to be correctly attached but it’s not difficult to trouble shoot. 
These chairs are very nice to sit in. We are above average weight and height and had no problem with the depth and width. Very comfortable to sit on because of the thickness and firmness of the seat.
What I love the most about these chairs is the great style and quality. No loose threads and such nice piping around the chairs.
The BEST part about the velvet chairs is the Tufting done on the back of the chair. So BEAUTIFUL. It raises the style of a usual parsons chair with the beauty of the tufting and unique design.
I highly recommend these chairs. Don’t hesitate, you will love them.