I work min. 2 days a week from home and I have to then come back to min. 3 computer systems go. My office is established in L-form and in order to get all the systems I'm going with my boss armchair from system to system. So I put the passage of time quite a few km of distance back. To date, my executive chair had (all as in the 100 price range) took this after a while ill by repeatedly min. a set of rollers broke. Now I'm not just anyone could be described as asparagus Tarzan and so the rear shock always had to do good for the height adjustment. Now that within 3 years of the second chair ceased his duties. (Rear shock and multiple roles defective) I decided to look around for a quality executive chair. The Amstyle Berlin XXL seems to meet all my needs. He was delivered after 2 days and the assembly turned out to be child's play. Even the roles in the aluminum housing make a much more stable impression than any previous plastic rollers. The design is very attractive and the surface material also appears to be very durable. All in all I am very satisfied with my purchase, and I hope now finally "my" chair to have found. Because the office chair my wife I will slowly but surely set its service order for them to Amstyle Berlin XXL. That is certainly in the price range the good races choice!