I ordered TWO Filco Majestouch-2 tenkeyless Ninja keyboards, with mx browns, from Amazon. They arrived yesterday, and at first I was thrilled to get these beautiful keyboards.
Then, after some testing, I noticed... PING!, BOING!, ZING! - actually just the same ringing tone, with varying degrees of loudness, when releasing the Back Space, Enter, and other keys in that general area. That's where it's the worst, but the whole board has this "feature" - and both keyboards do it, in exactly the same way.
How much $$$ have I spent on BOOKS from Amazon over the years? I don't want to think about that, but this will be my FIRST return to Amazon, ever - so they'd better take them back.
Anyway, maybe I just got two lemons, by coincidence. But I don't think so. I'll bet they're all like this, at least the browns. Actually it's not that loud, just mostly annoying. I once had a 1st-generation Matias Tactile Pro (sold) that was like a miniature percussion band: clicking, clacking, pinging and squeaking - what a racket!