The M key only works when the top of the key is pressed. I popped off the top of the key and everything looks normal to me. This is the only key on the keyboard that is intermittent in this way. The keyboard is now in a box under the desk, waiting for me to have the time to deal with an issue that made it past Satechi QC.
I like the feel. It connected immediately to Windows via Bluetooth. I bought it for a work keyboard but right now I’m using it with my laptop to do taxes.