As an early adopter of the Boundary alarm system, I've had my fair share of issues with the app/system, but as it's matured it has improved considerably. Installation is simple and flexible for anyone comfortable with a bit of DIY, with each sensor provided with both screws/plugs and 3M mounting pads (which are great for uPVC windows/doors). The app configuration is straightforward for all members of the household to use, they have the flexibility of using their phones, tags or entering a PIN code to arm/disarm the system. The system integrates with third-party solutions, for example (via IFTTT) my Philips Hue bulbs will turn red when the alarm has been triggered. The types of issues experienced along the way were some sensors towards the rear of the property disconnecting regularly, this was resolved with a range extender that was provided by the support team. More recently, I've had really unfortunate luck with the contact sensors where they've failed to pair and needed replacements. On the odd occasion, I've experienced issues with the Z-wave network where the alarm sensors were not reporting their status to the hub correctly which I've been told should be resolved in a future firmware update. Throughout my experience, the support team has been absolutely fantastic, they are both responsive and patient. Big shout out to Phil and Leslie who probably dread seeing my name pop up on new tickets!