The main feature it's missing is to have a separate "fan only" mode, so I can run the fan without being in the heat and/or cool modes. It would let me open the windows overnight without worrying about the heat/AC running. I used to have a workaround with IFTTT, but that functionality got removed. Another thing that would help is more calendars in memory. That way I could toggle between them instead of having to completely rewrite the calendar. Too bad because otherwise I like the system.