I have used one of these chairs for 7 years... and bought it used!  It has been awesome.  This new version is terribly uncomfortable.  The tall back is insufficient to support my head (I am 5'5").  The chair does not tilt and merely rises up and down.  Worst of all, the over padding in the front makes it impossible to sit on the chair with my legs closed. Literally, I can't cross my legs because the high padding in front makes it feel as if I have a pillow under my thighs.  Such a disappointment.