So finally I needed a really good office chair should avoid such painful experiences in the future. After many comparisons I chose the duo back - admittedly because he looks like he looks, that different. Stylish. The armrests were very important to me; in the shop, I can explain to me that they should be at the level of the table top, so that the arms can rest comfortably until the keyboard.
And what can I say? I am thrilled. For a year now I have no more back problems. The chair is incredibly comfortable, the back rest with rocker, you can sit back slightly and every visitor is immediately impressed when he sees the beautiful piece :-)
Strong buy recommendation from me!