I co worker of mine has one of these, and they're really nice. He can use his smart phone and see in every room in his house in real time. That would sure give me peace of mind, to know my home is secure when I am away. Does anyone have one of these systems? How do you like it? What are the advantages and disadvantages? How difficult was it to install, and what was involved? I see these things advertised in places like Costco all the time. But I'm not very tech or computer savvy. I don't even currently use a smart phone. What is the approximate total cost of these things? I'm more concerned about monthly fees, than outright purchasing, because I'll be retiring at the end of the year. I'd like to hold monthly costs to a minimum. Thanks in advance.