I'm going to give them a 3 star to try to be fair. Talking to Vivint seems like talking to different companies. I am a new customer and a few months later, one of my sensor was defective. I contacted Customer care and they gave me an option to either send a guy in there or they will just mail me a new sensor and give instructions on how to install it. I told them to send a guy out. The guy (I think his name was John), was great. He replaced it and said that he would not charge me because I was a new customer and they should've detected the sensor defect when they first did the install. Everything was great. A week later, I got a new sensor in the mail. I contacted Customer Care and told me it was their error. I told them if they send me a self addressed box I would mail it back to them so I won't get charged. Customer Care told me that I could just keep it and I would not be charged. A month later, I got two weird voicemails from Jean NV. It was their billing department charging me for $60.00 for the sensor they mailed. I had to explain to them what happened - I talked to Customer care about this issue. Apparently, their Customer Care system do not communicate with they Billing System. So no matter how much notes Customer Care put in their system, Billing Department cannot read them. So they still charged. Vivint has great people but their whole system is antiquated and inefficient and the good people of Vivint are suffering from this system flaw. Sad.