This is a good idea, I have not seen that many sensors of the sort that can warn you in cases of flooding or temperature change. They already had another campaign for their first version, which was successful, so the risk of this campaign is very limited. I also like the idea that they’re using the speaker of your phone to program the device. That will prevent you from having to connect with Bluetooth and save you time with pairing.
I am not sure if your insurance company will give you a discount for having a product like that, but it is definitely a possibility in the future. At the price, it is well worth it. Good job guys.