Silent keyboards (and mice!) are a blessing; and not just in an office environment.

I wanted to repair a HyperX mouse, but the switches I needed weren't available. I bought ones on a gamble because they were cheap, but they didn't fit, so I gave them away to a friend, and he used them to mod a cheapo mouse. It felt wrong to me for the clicks to make so little noise. He seemed happy with it, though.