In my opinion the best technical hack in that product is designing it fit over a deadbolt. That does an end-run over the OEM problem of needing distributors or partners to install and manage it, while providing a failsafe for when power or wifi isn't working. It also accounts for various denial of service conditions. It's not more secure than your existing lock in a physical sense, but it's cool that you can log door entries.

Would be an interesting product to perform a security review on.