The chair arrived quickly and I was able to put it together by myself, which I had been a bit worried about! Allen key supplied. It is comfortable. Two minor things, I am 5'3" and the seat is perhaps a couple of millimetres deeper than would be ideal for me, and the lumbar support is a millimetre or two out of the exact right place for me - it is not adjustable. The only other improvement I would have liked would be arms that adjust inwards as well as up and down - because the seat is quite wide, my arms don't naturally rest on them in quite the way they should. But it's comfortable, it is doing the job, and was not a bad price.