We went with SimpliSafe instead. I don't have any experience with their newest version, but their "version 2" which is still for sale has been flawless for the ~4-5 years we have had it. Never a false alarm and more importantly, NEVER a "can't connect to base station ..." error. It is $15/month for monitoring through SimpliSafe, but I'll gladly pay $5 more a month for reliability.

The system was quite easy to install. Having six sensors to place seems like a lot, until you realize you can’t cover everything though you can certainly cover enough. I found the system to be very responsive whenever it was armed or a sensor was set off (both the app and e-mail notifications were received mere seconds after an event). This is in marked contrast to a non-Ring security camera I use to monitor the entrance that can take several minutes or longer to send me notifications. The siren too was fairly loud, as I found out one early weekend during testing.
In addition to sharing camera access, having multiple users will make geofencing even more intelligent. The cameras will arm when everyone is away and disarm when at least one person is home. You can also see who is home and who is away using the mobile app and set up Presence notifications to alert you of the same. Finally, it brings everyone in on the action. If an event is detected, an alert will be sent to all users. If one user responds to the alert, other users will be able to see how that person responded. You can also leave a comment on the event and chat with other users directly within the app.
1. Nest can record continiously which eliminates the problem of sleepy security cameras. As far as Ring cameras, Ring Pro offers a pre-buffer. As far as their other cameras, I’ve only tried Ring Spotlight wireless. It’s a battery-powered camera and does not pre-buffer. I believe I heard that the wired version does pre-buffer, but I haven’t personally tried it.
My indoor Canary is self-sufficient, and that is exactly what I want in a home security camera. Flex has yet to provide that same experience. I’ve had to physically interact with the device multiple times to get it to reconnect to my internet. Also, the geofencing feature is inaccurate, often marking me away while home and vice versa. As for power loss notifications? They’re hit or miss.
In fact, just this week I had the power go out at my home, which is also where my office is. I had deadlines to meet, so I decided to go to a coffee shop where I could work and fill up on caffeine. It wasn't until I walked into my garage that I remembered I had to manually open the garage door, disconnecting the door from the chain drive. My particular garage door opener wouldn't let me reconnect the door and the chain drive, locking it in place, so I was stuck with a garage door that anyone could lift open with ease.

It was 20*F outside when I installed the cam. I didn't want to be running up and down a ladder if I had problems connecting to the network. I wired the cam up with a plug (from an old, grounded extension cord) and ran the wifi setup routine at my kitchen table. I verified everything was working (including the app, motion detection, etc.) before I installed it outside.