I bought this chair about 4 months ago.  It started off great.  Comfy, roomy, all good.  4 months later I'm noticing the seat is uneven, and even tilts forward at some points a bit.  I started noticing my lower back hurting mid-day, my hips super sore, and even my neck hurting.  I just re-did my office and it's beautiful but I dread sitting down every day now because of this chair!  I need to replace it ASAP.  So disappointed.