I was after a chair with good lumber support and comfort for long periods of use.  This Home and Haus chair has already proven to offer both, as I spent 9 hours at the computer yesterday with none of the usual backache.  It is firm, but provides support in all the right places.  I was particularly pleased withe the dark blue colour, that went well with the other furnishings in my home office, and, once the cream version is back in stock, I will purchase another for my wife's office.  In fact a great choice of colours.   Also, I had no real difficulty with assembly; the only tip I have is, do not fully tighten the arms until the back has been located. the rest is easy.