I tried out Vivint Security because my neighbor had recommended it, but I was frustrated right off the bat over the installation. I opted for professional installation, and the first appointment was a complete no-show, when I had taken an afternoon off work! When I called customer service (irate, but polite) they promised they’d get someone out the next day. Guess what? Another missed appointment, though at least this time I got a call to let me know. Third time is the charm, I guess, but even with the system installed professionally, it wasn’t working right. I decided with that kind of start I didn’t want to continue with the company, so I called to cancel the service (within the advertised window of time allowing cancellation). I still haven’t gotten my refund back, and getting them to agree to cancel was like pulling teeth. I definitely would suggest going a different direction than Vivint.