the comfort could (to me) to be better; The thigh support is relatively flat / low; and for tall people like me (183cm) is uncomfortable even a little too short, so I sit uninterrupted for several hours because just a little. Do I need to make up more often and break me move a little and stretch. A Rueckenlehnenverstellung also would be nice; the existing tilt mechanism puts this partly, but this is made quite simple and this also something seitwaertswippelig. The backrest should be higher. Uncomfortable the chair is not anyway, but just for my height and my mind verbesserungswuerdig. I have obviously the Groessenangaben not accurate enough attention because the design has to me very intrigued. At this price it is, especially for people up to 175cm, all quite useful chair.
UPDATE 02 June, 2012.
From 4 written down to 3 stars: the mechanics of the variety "cheapest" For the price better mechanism should be in place.
UPDATE 05 September 2012
From 3 to 2 star devalued: Now, after 3 months use creaks and wobbles mechanics quite strong; I am only 62kg heavy - at a higher body weight mechanics falls possibly even apart. A chair for 50, - is probably worse to nothing. The chair scores exclusively with style.