We purchased our Herman Miller chair about 3 years ago and were very pleased. They one day the hydraulic cylinder failed. The seat went to the floor and would not come up. I contacted SeatingMind, they directed me to the warranty page which stated "The warranty covers the entire chair's mechanics for 12 years from the date of purchase". But customer service response was "Since the chair has been in your possession for 3 years and it worked just fine the cause of the cylinder failing is NOT under our responsibility". How's that for a 12 year Mechanical warranty.