My husband is 6ft 4inches - tough to shop for and had a terrible chair which had what APPEARED to be padding, but when you sat down, it basically went straight down as if the padding wasn't there. I myself work in an office with incredible chairs that run par with aero - in price and support, so when I went looking for a chair to replace his, I was looking for something of similar quality or perhaps just a touch down, but not much.
This chair, though not quite as great as my work chair, sure is a close second. He is able to adjust the headrest to fit the curve of his neck and the bottom half of his head, the back support piece is easily adjustable and even after a few months of use, the cushion is still just as supportive as it was when we bought it. My husband, at first, wasn't sure about it because he sat a little higher than he was used to, even at its lowest setting, but after a day of use, he got over that and now raves about the chair. It was a VERY good buy.