Blue one sinks very slowly and head rest broke but is still comfortable and the wheels are in good shape. Good zero budget gaming chair for a long leg person. The seat pan is deep. So
Green one is Herman Miller with the up down, adjustments and wheels working. Arm is broken and needs to come off. Foam is breaking down. Was an excellent ergo chair for 20 years. Could squeeze a couple more with a padded seat cover or perhaps you have upholstery skills