I don't like that you need to use their API, it could be integrated into an existing app but then other people would have access too! That's not good if your customer wants security or privacy as they can see what apps are being used by users around them with this technology which may lead some customers away from using our product (or any others).
The ability of having multiple sensors in one place - so many different devices connected together without needing additional hardware/software costs makes us feel very innovative at times.