I was part of the kickstarter group prior to release of the product. We purchased the full kit including the Siren. the product looks very premium and the Siren stands out in our street. The setup was very easy. The batteries in the PIR's and Door Sensors last a long time (over 6 months). The Siren battery has lasted well over a year. The mobile app is brilliant as it allows you to remotely set and unset the system, get alerts when someone enters or disarms the alarm. You can also add users/family members too so they can manage the platform. I have set up some simple IFTTT routines for when movement is detected and the system is armed. I have also contacted the helpdesk on a few occasions with questions and initially a couple of anomalies and they have been very quick to respond.