The 2GIG systems can be installed yourself, but you have to prepared to research. They are big enough that third party monitoring companies support them, but they are really designed for installer use, so a DIY installation requires a bit of know-how. I replaced my ADT system when they bought Brinks, and I really didn't save a lot of money, but I got a degree of control, and avoided the monopoly. Pleased.
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The 2GIG systems can be installed yourself, but you have to prepared to research. They are big enough that third party monitoring companies support them, but they are really designed for installer use, so a DIY installation requires a bit of know-how. I replaced my ADT system when they bought Brinks, and I really didn't save a lot of money, but I got a degree of control, and avoided the monopoly. Pleased.