Sentinel Alarm had already installed a few items when we bought our house, so I contacted them about providing our service and adding additional items to our system. I did NOT have to go with Sentinel, we could’ve went with anyone, but I’m glad we chose them! Darrell, the owner, was the one that came out to install the additional items we requested. He was absolutely fantastic to deal with, not to mention an extremely nice guy! The one time we did have an issue, he even came out on an OSU game day to take care of it. My friend a few doors down has them as well, and even has a security camera system installed. He’s been just as happy with them as we have. Our monitoring service has been completely fine as well. We’ve had Sentinel for over 2 years now with absolutely no complaints. I’d highly recommend them if you’re in the market!