Engadget and Wirecutter have found the best home security system:
“After spending more than 40 hours researching and two months testing 12 monitored home security systems, we found SimpliSafe to be the best self-installed option for most people. SimpliSafe gives you the benefits of a 24/7-monitored security system without locking you into a long-term contract, and it’s affordable, reliable, and easy to install and use. SimpliSafe also offers the most comprehensive choice of systems for homes and budgets of all sizes.”
https://www.engadget.com/2018/05/20/the-best-home-security-system/