Those sensors work great. They are actually the ones I’m using for Bed Presence for ESPHome, which is officially available for purchase! As to not hijack this thread anymore, head over to the Bed Presence forum post for further discussion.
The only caveat to the price is that Interlink has a minimum order quantity of 4 sensors and $10 shipping and handling. So if you only want 1 or 2, it’s less appealing. They cost around $17 on digikey, but it looks like they don’t have any in stock.