it is likely to generate a lot of false positives (because chambermaids have totally legitimate reasons to move things around as they clean)The example use case they presented was to put the phone in the hotel safe - not a place anyone other than you would have any legitimate reason to disturb.
The device is designed to treat every disturbance as suspicious, so obviously it will generate lots of false positives if you put it somewhere where disturbances are common. That’s not a problem for the app to solve though, that’s a question of the user’s tradecraft.