I didn't buy this chair on a whim. I spent an hour one day trying every chair in the store then came back on another day and spent a half hour reading in each of my two favorites. This chair was the clear winner but I wasn't sure it would pass the 8 hour test and I was prepared to take it back if I wasn't really happy. no need to return it - it's great! the seat is soft enough the mesh back provides flexibility and allows for the circulation of air to keep me cool. most importantly there is the right amount of lumbar support just where I need it. finally I find the adjustable arms are very helpful - I adjust them during the day depending on how tired I am and the variety prevents me from getting stiff in one position. I'm very happy with my purchase and I'm pleasantly surprised given the price.