I purchased my Kevo about 2 years ago when moving into my new home and can't think of how we lived without it. The greatest feature is allowing me to send guest keys or scheduled keys. The addition of remote lock/unlock when in bluetooth range is great but really wish I could do it remotely WITHOUT having to buy an additional device.

You should also really consider creating an IFTTT channel so that you can integrate with more services as well, I'm satisfied with the Nest integration for now, which actually lets me just trigger stuff for when I put my Nest on away (which is done from the Kevo app).