The chair is great extremely comfortable and very easy to assemble except for the head rest. It was really difficult to attach the head rest to the back of the chair (this is the last step). There are no holes for the two screws to screw into on the back of the chair only what I can describe as notches. In order to get the thread of the screw to line up to the thread on the notch you really need to press down HARD and at an angle In order for it to attach. Otherwise you just keep turning and turning the Allen wrench. Frustrating! Once we figured that out it was fine but it took a while.
So far so good. I purchased the chair about three weeks ago and it has made a major improvement due to the number of hours of sitting at my desk at my home now. I give the lumbar support a thumbs up.