This is a beautiful chair - far more attractive than conventional office chairs. It's maybe a little unfair to judge it against chairs that are designed for prolonged use, but if you're looking at this chair as a possible 8-hour day desk chair, I'd say keep looking. My shoulder starts to hurt around mid-day using this chair, and gets worse throughout. 

If you're looking for something that you won't use for prolonged periods, or that you will use in a different context, the chair is lovely. We now use it as a piano chair.