There was an issue with the iOS version of the app finding the lock during registration, but this has been fixed with an update.
There is no override facility, but this is testament to Yale's confidence in the product. The Conexis has been in planning for well over 12 months and much of the technology regards the tags and cards is already working with existing Yale Keyless locks. The Conexis incorporates the unlocking features of the Keyless, but with a Multipoint "lift to lock" handle and has has been rigorously tested by Yale.
Should you try the lock and not feel comfortable with it you are welcome to return it.
Anthony N