The heater does a really good job of heating. That said, there is annoying clicking sound that happens as it turns on and off, which it seems to do often. We have the heater in our bedroom so the clicking can make it difficult to fall asleep at times.

I am not sure how the thermostat works, however, it will read that it is 76 degrees in the room when I know for certain that it is actually 67. That said, the room feels warm so it is heating at an appropriate level even though the temperature reading is such that you would think it is not.