Genius. I remember once where I set the coffee pot up the night before, but didn't tell my wife. She added more water and we had water and coffee spilling everywhere. I leave a note now.
It didn't spill over when it finished brewing. but because it was so full, when I took it out from under the top part, a bit of it spilled. I've had the opposite problem. I've forgotten to set it up the night before, got up and turned it on in the morning and ... nothing. I've also filled the water tank and forgotten to put in the coffee grounds.