I had this chair for less than 2 months. From the start the arms felt flexible even though the screws where tightened. When leaning back in the chair when in locked position it still felt as if you could rock back when trying to support your back. Yesterday when leaning back the seat (which is made from thin plywood) cracked where the front of the arm connects to the seat. Staples warranty dept has been great and ordered a new seat but I doubt this chair will last a year.
Absolutely comfortable. Had a little problem with delivery but once received it was very easy to put together and it looks nice at my desk and again it is absolutely comfortable!