I tried two other brands. The first was faulty, I do not know if it was the unit or the software. I returned it. Went with another brand that had Alexa built in. Unfortunately, the other Alexa devices in the home would only recognize the thermostat on an intermittent basis. It was returned.I was ready to go with an old school thermostat, but decided to give Sensi a try. So far, so good. It has been a few weeks and Sensi has worked flawlessly. This unit can be powered by a C wire, or batteries. So if your home does not have a C wire, it will still work.It has been very nice to have the thermostat controlled by Alexa. Especially in the middle of the night and you don’t want to get out of bed.Should something go awry, I will update this review. However, based on the few weeks it has been installed and the need to return two other brands, I highly recommend Sensi.