First use seems to work well. The issue is the manual for connecting the thermostat and receiver and then with the app on the phone via wifi. They have the worst possible manual, only by searching on the internet did I figure it out. I will briefly write the process: turn on the thermostat and receiver to see that they work, then turn them both off, press and hold the clock button on the thermostat and it shows B1 which are the first 2 digits of the IP, press the clock again and it goes to B2, enter the next 2 digits of the IP (they are on the back), then go to B3 - turn on the receiver and then press the up arrow on the thermostat several times until it shows 55. Turn off and on the thermostat and they will connect to each other. Then from the receiver press the push and connect the device from the app. I don't know why it's so difficult for them to put it step by step in the manual...

Everything works fine but I couldn't solve this issue with the wifi connection. When I'm not on the same wifi and with my mobile, I can't control the thermostat.

The review is done quite some time after the purchase to verify the battery life (2 sets).
Indeed, the batteries last less than a month, so that's why minus two stars.
Otherwise, easy installation, does not replace old type thermostat without phase + neutral power supply.
The customization is complete.
Programming is quite easy if the operating mode is understood.
On the positive side, it works through Smart life.

I bought it because I wanted the remote control and also because I can take the thermostat unit wherever I want inside the house. Very convenient. The position where the old thermostat was located was in a space where the fireplace operates during the winter, so I had a problem because in order to warm up the rest of the house, I had to set it at a high temperature and often forgot about it. The problem was solved. Very easy connection with the smart life application, many settings, and locking of the control so that the children cannot interfere. Overall, very satisfied. Connection to an oil boiler with N, L, and NO command, but a bridge with COM was also needed. It has detailed instructions. Recommended despite its slightly high price.

So far it looks good.
Very easy wifi setup
with a button you press on the base.
Works with SMART-LIFE GOOGLE. HOME. ALEXA and voice commands.
Connection to my oil burner: Neutral L phase
Bridge the L with COM
Command is NO
In programming, the temperature is adjusted by 1 degree and not by 0.5 as in manual adjustment, which is wrong for me.

I am very satisfied with this thermostat. The instructions for connecting to wifi are a bit confusing and you may have difficulty. However, it has full smart functions and seamlessly connects to Google Home. You can configure programs (daily/weekly/weekend), temperature, temperature increment change, maximum thermostat temperature, etc. Basically, all the functions that you can set in person on the thermostat, the app allows you to adjust remotely. The sensor is as sensitive as needed. The sensor can be powered either by batteries or by a USB cable. It is recommended to use USB for direct synchronization with the thermostat.

It does what it says and it is a reliable product. It wirelessly adjusts the temperature, can be programmed for 5 different times of the day with 5 different temperatures, can hold a different program for weekends or just Sundays, can be controlled from your mobile phone via WiFi, and can always be near you to adjust the temperature that interests you and not just in a corner of the apartment.

But: The screen requires a specific angle to be readable, installing it as a smart device is not the easiest (nor the most difficult), programming requires having the manual next to you to know which parameter you are setting each time because it displays them with the number of the parameter on the screen (unless you program it from the mobile app, which I highly recommend).

Overall, as I mentioned before, it is a reliable product, although it might be more cost-effective at a 20-30% lower price.

After 2 months of having it installed, I have been very satisfied. Minimal desynchronization with the base (you simply close it and reopen it and it connects on its own) and very easy temperature calibration