Review on Linkind Wireless Smart Home Security System: DIY 5 Pieces With Siren Alarm, PIR Motion Sensor & Door/Window Sensor For Office And Home - Compatible With Alexa by Theodore Huynh

*Update 9mo: System issues have become progressively worse and now the hub/app is automatically initiating the failing update, which never completes. It also never works properly until reset to previous version. (Pita) Time to find a new reliable system before their servers go away. *The system works without falsing. Tamper detection is a good addition, implemented to indicate hardware tampering and when system is offline. (i.e. network interruptions) There are only two significant (but so far, not a show stopper) issues:One is that the android software can have updates that will interrupt service (be prepared to log back in) and possibly reset connected devices. (sensors and hub) Skip app updates until you're at home and can properly deal with any issues.The second is that the QR code won't work to sync devices after the initial "all in one" setup. It might be fixed now, but you had to go to the camera/QR scanning screen to get a functional "I can't scan" button. When this works, it allows you to manually reconnect sensors to the hub. The first "I can't scan" button you would see, did nothing.Currently the system is fully functional with no issues, and for the price I don't think it can be beat. (for a wifi connected "smart home" style alarm system)