This is what I want them for, in particular for an automation I created for my cooktop to turn on a lightstrip in the kitchen when the stove is on - keeps my wife and I (OK, really just me) from forgetting when I've got something simmering, or just plain walking away to eat and fogetting to turn off a burner.
It's very cool and does exactly what I want to do, but changing batteries on the sensors is a bit of a PITA, have to remove the front of the cooktop, so having very long-lived batteries in the Aqara contact sensors will be a plus.
