Been an owner of a Vivint system for over three years. 42 months to be exact. Signed up and had nothing but issues. Salesperson claimed that I was supposed to get pan and tilt cameras - didn't work with the panel I was given so the install rep informed me of that after he walked in the door for the install.
Turned around and installed different sensors and modules and then diligently paid my whopping $68.99 plus taxes a month for 42 months.
Within 6 months I pulled the thermostat out and installed a Nest - the default one was garbage. System was relatively stable except it would never update, ever. Had to check for updates like a 2005 wifi router.
Then when you get to the end of the contract, they pretend you're getting a good deal paying $70/mo for basic old 2Gig hardware and 42 month old panels. Then you cancel and the email comes in telling you they'll do $35 a month, but they won't honour the door locks, thermostat control or anything else.
Honestly, if you want to buy a garbage alarm system and pay less you're probably better to go to Think. If they existed when I was dealing with this years ago - would have bought from them. Instead - I'm stuck with a ton of 2Gig hardware and a bunch of greedy Calgary companies that tried to force me into another contract.
This industry is dominated by shady players.