Satisfied with the units although WiFi setup was a bit challenging. Two units went online easily, the others two were troublesome. Finally got them online and the app functions well.
About a year ago, I purchased this thermostat to replace an older programmable thermostat. It is easy to program and temperature wise, it is accurate. I mainly purchased this so that I can monitor the temperature in the winter when we are not home. You can set up alerts so that you are notified on your phone if the temperature inside the home drops below a set temperature. It has a lot of other features which are nice. It shows the run time of your furnace daily, weekly, monthly, or annually. I also receive notifications by email monthly regarding the same information. It also has a geofence function to help with efficiency to actually monitor your normal patterns at home. Since we are retired, we are home every day, so this was not neccessary. Overall, a great thermostat that functions very well and has tons of features.