I read so many posts about folks having problems with their systems. And I'm sure they are, but I have had a different experience.
My system has been 100% reliable for over 3 months now. No down time. No slow downs. The only time my hub gets rebooted is for a firmware update. All my automations, controls, etc. have worked perfectly. I probably have about 100 devices, a mixture of Z-wave and Zigbee. I don't use RM, I have my own apps that take care of everything.
The only exception was a door switch that acted up. But that is not an HE issue.
In the same period of time I have received quite a few emails from ST about system being down in one way or another.
So for me this is a great system.