As another person mentioned, the back does not come forward enough to sit upright. The chair is also very tall, and will not go any lower. It is advertised as having a tilting seat, but does not have the knob to make the adjustment. I feel like I was sent the wrong chair. It is missing several of the advertised features

It’s great! Though one not ergonomic and with a deeper set would be awesome

This is a great chair. Purchased for my husband who is 300lbs. Very comfortable and sturdy for him.