Bit late to the party, how does the Hyyp thing work? I see a few guys selling the module but no one is clear on whether or not the service is paid for?Busy with it on my side. Long process (laziness from my side) but will get there eventually (I hope). So far have managed to get all their web service calls into HASS (using Python scripts to do the calls) - don't need HYYP app on the phone. My alarm arm/disarm/bypass/etc. are driven by our home/away status and the time of day. Hope to completely cut out their web service/MQTT/HYYP route eventually and control the system directly via the HYYP module and the Mosquitto broker.
I know your experience hasn't been great but as of late ADT seems to be using the service and friends of mine are happy with the reliability as of late.