About two weeks back, I mentioned keycap wear issues with the Microsoft Natural Ergonomic Keyboard 4000, and these keyboard stickers made by Meri Distribution, which I hoped would fix the problem.
Well, they did. For about a week and a half. They're wearing at an extremely rapid rate. There is already severe wear (which is to say, large white patches where the letters were) on six keys, and moderate wear (small white patches not obscuring the letter) on three more. So that, unfortunately, was a nearly complete waste of twenty dollars (for two sets, while I had a discount code to use with the vendor).
It's a shame, because they really are extremely clear and readable, even in dim light.
(Note: I consider this in no part a failure of the vendor, "Baron Bob".)