I don't know why the Nest thermostat is called a smart thermostat. In a few key ways, it's actually a lot dumber than the 30 year old programmable thermostat it replaced. - There is no indicator to let the user know when the thermostat is requesting heat or cooling from the HVAC unit. - There is also no way to see energy usage of the current day - you have to wait for the following day and then go look back on the previous day.