I have one from mid-2014 (base model W550SU, now-bankrupt distributor), used about as heavily as anyone would ever use one (probably averaging sixty hours a wee

I have one from mid-2014 (base model W550SU, now-bankrupt distributor), used about as heavily as anyone would ever use one (probably averaging sixty hours a week). Its keyboard was not great within one year (spongy), and distinctly unpleasant after two years (very spongy), with its space bar becoming extremely unreliable during the third year. It became impossible to type at speed on it.