Pretty comfortable. My only complaint and its a big one is its impossible to lean back. Unless I grip onto something and push really hard and then I have to keep my feet raised on the desk. Theres no way to use your feet or your own body weight to push the seat back. And even once back it only stays there if like I said I hold onto something other than the chair. And yes I have the knob loosened all the way to allow full leaning. Imagine an airplane seat with slightly more padding that only reclines about a half an inch. thats what this feels like.