This is a self-service type Cellular Home Security System. By this I mean we spoke with a customer care specialist via phone and he helped us determine what our needs were based on what we told him about our home. He was very courteous, knowledgeable and helpful and we decided on our needs fairly easily. We paid for the components and they shipped them to us within 3 days, very quick. When our system arrived we followed the simple installation instructions. We installed sensors on 5 exterior doors, a glass-break sensor, 3 motion sensors, a flood sensor (basement), 2 smoke/heat sensors, 1 heat sensor, main control unit, 1 remote touchpad, and 1 remote keypad. This very easy install took us about 45 minutes. Our directions were to call an installation specialist when we had everything installed so we could test and activate the system. The specialist walked us through it step by step, testing each sensor, the remote units, and the main control panel which was pre-programmed for us. Everything worked like a charm with only a couple of adjustments. We also were directed to download the Alarm.com Apps for our phones and tablets. We activated the system and it's been working flawlessly ever since. Easy.