I like the ease of the thermostat but not being able to connect to a remote sensor is a problem. The thermostat sits in a hallway and my room has a set of French doors and two windows. Without a remote sensor it does not detect the correct temp in my room, therefore it is either warmer or cooler than it should be.
One of the option in Mode should be both heat/cold as needed for the set point. Currently, I have change the mode as the outside gets hot in daytime or cold in the night for the same inside temperature.