This is a great buy especially when Staples has their office chairs on sale. The mesh is a little strange at first but it's very comfortable in the long run. The seat back allow you to decide to keep you very straight if you have back problems. The head rest can also be adjusted to keep you upright if you wish.
I have looked for a seat meshed chair for a long time -- and this one is perfect for me. The seat and back are stable and supportive and the price is excellent.