This chair is comfortable with about a firm 1.5" thick sponge seat.  I like that the vinyl material has a pebble leather-like feel and is easily cleaned.  The all-metal base is especially high quality.  The chair adjusts smoothly up and down and there is the option to be able to tilt the chair backward and lock it down.  There is some lumbar support with the curved shape of the back.  Overall great purchase at a great price.