Ehhh... I wrote a device driver specifically for the Monoprice sensor.
I found the Monoprice sensor to be inexpensive and completely reliable. It's only gigantic flaw is that it is not sensitive enough. Not even close. A fall from height on a hard surface will always trigger it. But it won't pick up vibrations from a washing machine or dryer for example.
Also, Monoprice pisses me off a little with the RBoy partnership. They advertise and sell Z-Wave products with features that are only available behind a pay wall unless you are a developer or can find a driver already written.
They also won't publish reviews or answers that clarify that. That's shady and it rubs me the wrong way.... But I keep buying their contact sensor because it's the cheapest one I've found that supports an external sensor.
Anyway... All off topic. I'm done rambling.
