It took me about nine months to complete effective installation of a system in a large house. It required three independent panels, which is a real demerit. To arm this house you have to do it separately on each of the panels. If an alarm goes off you have to figure out which panel has the issue. Also there is a known problem about the m each panel's capacity for cameras. They advertise that 12 cameras can be accommodated by a panel, but they know that each panel can only accommodate seven cameras. So not all of our cameras work. This created a major problem in my situation. The customer service is uneven, but often terrible. Individual technical support people are decent in general unless they tell you to hold for five minutes and it turns out to be 40 minutes. But the customer support is weak. It can take half an hour on hold when they tell you the estimated wait time is two minutes. And they tell you that your estimated wait time is one minute for about 25 minutes straight. When the call drops they don't make a good effort to call you back so it'll be another 30+ min on hold just to start over. I wouldn't advise people to invest in a Vivint system.