The last sentence can make or break a system.  I have a takeover job that is somewhat extensive, but not implemented so well.  The rack is only one part of that story, but most telling is that the client said his wife opens up the C4 app when they are out at their Arizona house and turns the exterior lights on and off every evening/morning.  I told him we can just set a schedule, and it will be set to an astronomical clock so they won't have to ever adjust it.  He was pleasantly surprised that the system was able to do this.  He had his system for roughly 5 years and his wife has been doing this all along.