I have two ThinkPads: X201 Tablet running Windows 8, and a T530 running Ubuntu. The craftsmanship of the keyboard and ThinkPoint nub is unmatched. As a hacker, I cannot find any sufficient replacement.
For many years, ThinkPads had the best quality keyboards on any laptop. At least that was true of the IBM models I've had. I can't speak to the quality of the Lenovo-era models.