I've had this less than  2 years and one of the feet just snapped off without warning while I was sitting in it, dumping me unceremoniously on my back on the floor. I have noticed periodically that the seat will lock in place and will have to be manually unlocked, I don't know if it's related. I am well under the weight limit and only use it for part-time work at my computer so I don't know what gives (beside the foot, of course). Otherwise it has served me well and is fairly comfortable.