Bought this chair and the only thing it really does is go up and down. You cannot adjust the tilt although it says you can. Just doesn’t work. Sit in it more than 45-60 minutes and you are stiff. Just an all around mediocre chair. Spend a bit more money and get something that is actually useful.
The only fault I think some might find is that the chair might be small for large frames people. We are small people so this was a plus for us. So often chairs like this are too deep and big for our comfort. Excellent chair for the money.