Comfortable, especially on the lower back. The mesh idea breathes so the heat doesn't build up and make the back sweaty. Only negative would be the adjustable arms. In the completely down position they're secure and no wobbles. In the completely up position, which I need, the only thing supporting them is the backside of the button used to raise and lower them. The right arm is ok but the left one wobbles and makes noise as I move my arm while it's resting on it. Not worth disassembling and sending the chair back, a small nuisance I can live with.For the price, a very good chair.