i bought this chair based on the good reviews. this chair is far from comfortable. the mesh on the chair bottom is stretched tight and is very hard. sitting for more than 2 hours at a time is difficult. the lumbar support is only adjustable up and down and not front to back. the seat is at an awkward angle and very difficult to get comfortable in. Three stars for how smooth the wheels roll and placement of the headrest. i honestly cannot figure out how this chair got these ratings especially at this price. sending this puppy back to where it came from.