Let me start by saying this smart switch does deliver on its core promise - being able to monitor and control temperature/humidity remotely through your phone is genuinely useful. I've been using it to manage my basement dehumidifier, and the auto mode that turns devices on/off at specified temperature ranges works decently well.

The installation was straightforward enough - screw it into your wall socket like a normal switch, connect via WiFi, and you're good to go. The eWeLink app interface is clean and provides helpful historical data graphs for temperature/humidity trends.

However, I've experienced the same frustrating issues mentioned in other reviews. The unit CONSTANTLY reverts from Fahrenheit back to Celsius no matter how many times I change it in settings. Also, one of my two units keeps disconnecting from WiFi randomly - super annoying when you're trying to check temperatures remotely.

When it works properly, it's great for: - Controlling space heaters in baby rooms - Managing grow tent environments - Automating attic fans based on temperature

Just be prepared for some reliability headaches. For the price, I expected more stable performance. It's a good concept with mediocre execution.