I was literally going to call them today to monitor my house's pre-existing ADT (DSC I think?) system out of practicality. Now, I'm not so sure.
Edit I wonder what modern solutions exist in this space for takeover of old systems. It feels like every alarm system installed is designed to extract your money for components for 3 years or so and then immediately become "discontinued." Most of the companies I see want me to buy a new system and lock into 3 years of monitoring. It wouldn't be so bad if the components weren't so damned expensive. $1k to fit out a small house, no smarthome nonsense even.
Edit I wonder what modern solutions exist in this space for takeover of old systems. It feels like every alarm system installed is designed to extract your money for components for 3 years or so and then immediately become "discontinued." Most of the companies I see want me to buy a new system and lock into 3 years of monitoring. It wouldn't be so bad if the components weren't so damned expensive. $1k to fit out a small house, no smarthome nonsense even.