Just set up the chair and this is a great product.  It is very comfortable with the lumbar support. There is a surprise to the chair on the lumbar support. I realized that there was a usb cable in a pocket on the back of the backrest. I connected a battery pack and it turns out it is a little vibration unit in the lumbar cushion. Not a bad feature to help with a light massage to your lower back. The price point is good for the quality of the chair.