After many years with the HP EliteBook, I needed to upgrade, and the best equivalent seemed to be the ZBook, and it certainly has not disappointed. This is a great machine. The lit keyboard, which I thought would take some getting used to, is excellent, and the keys are pleasant to work with, just the right resistance and "click". The enlarged arrow keys are also helpful. The HP software appears strong, so far. My only struggle has been to get used to Windows 10. Groan! :D