Been thinking of cancelling ADT too (well Telus now since they bought them out) The alarm will randomly glitch on me and cause a false alarm when I leave the house. It will usually do it if the alarm was in "stay" mode and I leave the house. I disarm it, then arm it again in "away" mode but it's like it never registered that I disarmed it. It doesn't always do it but it's been several times now this past few months. I miss the old system, it was a bit more analog and it just worked. This one is basically a glorified tablet running a real time OS and it lags sometimes.
I may go a DIY route at some point and put in my own system then I'll find a 3rd party monitoring service that monitors DIY systems.
That is exactly what I did, except I already had a system. I went with Alarm Grid for a fraction of the monitoring cost. I found the company when searching for a replacement door sensor. They strictly support people that want to do DIY systems. I will likely upgrade some aspects of mine by purchasing components through them. I was unsure on a few things, and they quickly answered questions regarding exactly what I would need in order to accomplish.
Spent about 20 minutes on the phone with a very helpful tech that stepped me through reprogramming my system, a 20-year-old ADT system, to their service, including testing, the system. Then went on their site and provided insurance co. info, and they sent an Alarm Monitoring Certificate to them for my discount.
My monthly monitoring fee is 25% of what I had been paying, before ADT jacked the price up effective this month. Had it a couple of months now, and I have to figure out where I have anything less than the ADT service.
This will save me about $500 a year...