Excellent thermostat, accurate and easy to install. It has been working flawlessly for 1 year now and during winter it keeps the temperature of the house stable at 20 degrees.

I bought it on behalf of my friend, so I don't have personal experience, but from what he told me, it is a reliable thermostat with a temperature deviation of about 1 degree. For its price, it is very good

Reliable thermostat, attractive, comfortable, functional, easy to install, maintains a stable temperature without any fluctuations. It accurately reflects the actual room temperature with a room thermometer. For example, if set at 22 degrees, it shuts off at 22 and opens again at 21.5. I have been very satisfied with it for the past 2 years. I had the previous one for 15 years and it was also very good, but this one is more precise. (Of course, proper insulation of the house and insulation in the installation from the back are necessary to prevent any heat loss and drafts)

Easy to install. The round temperature button turns easily, without sticking like in an older one I had of a different brand. The positive thing is that the ON-OFF button is in front and not below, and you have direct visual contact. I haven't checked for temperature deviations. But it doesn't bother me either. I know where to leave the temperature button to have the desired warmth in my space. And a very affordable price.

The deviation from the actual temperature is 3, 4 degrees and moreover not stable.
It is a completely useless device.

Very large temperature deviation of the thermostat. The temperature was measured by two thermometers, an analog and a digital one in the same room where the thermostat is located, which read a temperature 5 degrees lower than the actual one.

Particularly sensitive, so be careful when placing it.
If you tighten the screws that hold the cables too much, there is a risk of breaking the plastic and the contacts. In one of the two that I bought, the light did not work, probably due to the detachment of its contact.
The one I replaced was again a Siemens analog. However, it lasted 20 and more years (and still hadn't completely broken...). I see myself changing this one in 2-3 years.

It's whatever.. close to 4 degrees of deviation measured with a digital thermometer. It never knows if the boiler is opening or closing.. I don't know if there is a worse one