Let me get this out of the way; I’m a keyboard snob. I’ve been typing for a very long time, and still have fond memories of my IBM Selectronic (with its very nice “buckling spring” keys), and my old ...
Switched to the Microsoft Natural Ergonomic Keyboard 4000 you linked and have some of the same problems. I don't have any issues with the membrane, but my work keyboard is completely missing the "L" ...