Overall I am pleased with Vivint. For the most par...

Overall I am pleased with Vivint. For the most part they are helpful. However I had a couple of bad customer service experiences that had to be escalated. My last one was terrible. I was supposed to receive some extra sensors for an issue I had where I couldn't arm my system for 10 days because a technician could not come out. It's been almost 4 months and still no Sensors! I emailed 2 months after I was supposed to receive them to be told they were shipped but I never got. They were supposed to ship them out again. 2 months later still nothing. So I send another email with the same reply that they were shipped but there's no tracking #! Really? Come on Vivint, you can do better than that...