I bought a fancy office chair from Office Master as a early birthday present for myself. I have had 3 different office chairs over the years that were not as adjustable and always seemed to be dumping me forward and out of the seat. This chair adjusts seat up and down and tilts more than the others. The back also adjusts not just up and down, but forward and backward so that I can sit with my back up against the back for support so my back and shoulders don't get tired. Also, I am short and the other chairs were just too deep from the front to the back of the seat to be comfortable.