Comment by wongarsu

I have a hall-effect keyboard from Wooting, and they are indeed excellent. Very reliable, and setting the trigger point in software/firmware allows a number of interesting features like triggering different key codes depending on how far you've pressed the key down, enabling more rapid keypresses or using keys as analog input.

Their first keyboards actually used optical switches, and from everything I've heard were less reliable, and tracking precision was much worse than with the magnetic switches