For those unfamiliar with how these feel: these have similar actuation force to Cherry MX browns, but with tighter tolerance. I can't really speak much on the tolerance, but Kailh coppers have a crisper and heftier-feeling tactile bump, whereas Cherry MX browns have a mushier, more drawn-out bump. Also, Kailh coppers take less distance to actuate, so you get nearly instant tactile feedback when you begin to press a key.

I ordered 100 of these, and I received exactly as many as I ordered. Every switch works perfectly fine, too, in the two keyboards I put them in.