I've had the Task Chair for about 3 months now. It was easy to put together, and has been great until now. I just stood up and all the sudden two of the wheels broke right off! At first I thought maybe they just fell off because you assemble them and attach them to the chair initially, but the metal that supports these two wheels broke which made them come off. I have no idea how this happened, next step is to contact Wayfair customer support. I will update this review to report on how this matter is handled.