The lumbar support bar arc is too sharp the highest setting is too low and the adjustment mechanism slips. Either the bar needs to be more adjustable (e.g. angle height) and the slope gentler or it needs to be removable. Otherwise I think it's a great chair.
I love this chair and now have purchased a total of 3 over a couple of years. One for my office one for my home office and one for my wife's office. if I ever need another office chair this is what I will buy.