So far, the integration is working great for certain devices, but one hole I've found is that if I have the thermostat mode set to "Auto", it doesn't show the heating & cooling sliders separately and it's impossible to set the setpoint of the thermostat. If I set it to Heat or Cool, I can then set the setpoint.
It's definitely possible to have this work as it works OK from HomeBridge, so thinking it might just be a miss. I tried both the generic Z-Wave thermostat driver as well as the Honeywell specific ones with no change in behavior.