From the app, you can control and manage your Nest Secure system. Of course, you can arm and disarm your system, but you can also see sensor status as well as sensor history. For example, you can see if your door is open or closed and you can see when it was last opened and last closed. You can also use the app’s Remind Me feature to remind you to arm your system if you forget to do so.
When Ring worked as advertised, it delivered on all its promises. I never had any suspicious characters press the button, but I blew my neighbor’s mind when I communicated with her—quite easily, through the doorbell—while I was on vacation in wine country, 80 miles away. Unfortunately, I couldn’t help her get into her house (she had locked herself out), but it was a striking illustration of what Ring can do.
Update 1/24/16 - I have found a fantastic use for the Ring Doorbell and Chime. My mother-in-law, now in her 90s, lives by herself. She has become hard-of-hearing and often does not hear the doorbell. By installing the Ring on her door, she now is bothered much less (solicitors tend to recognize it and don't seem to like it) and when someone rings the bell, the Chime, placed by her favorite chair, gives her a better chance of hearing someone at the door.