It's a bit of a mystery in its menu; it could be more user-friendly, but overall, for the money, it's quite good.

I rented a house and it has this thermostat and NOBODY knows how it works....
It is extra complicated and for no reason at all.
I searched online but I couldn't figure it out there either.

Incomplete manual, difficult programming to the point of being impossible and essentially useless product as it only works with the program you provide.

I have had it for 2 weeks, I connected it myself since you only have to connect 2 cables (power and ground). It has very good sensitivity and any deviation from the actual temperature can be easily calibrated. At first, I considered it a serious problem that it doesn't work manually, meaning you can't open or close it yourself. However, I realized that you set the programs once (the hours you want from Monday to Friday and different ones for the weekend) and you're done! Of course, if you want to increase or decrease the temperature within a program, you can do that and it lasts for 6 hours until the specified program starts again. The only thing it requires is a little reading of the manual

I bought the thermostat with the logic that it would work like the SG100 (meaning manual temperature adjustment). The SG200 only works with the 3 programs it has, so in order to set the temperature, you have to choose a program to change the temperature per hour/day/week. There is the option of manual temperature change (like someone would use a regular thermostat), but this is temporary until the next scheduled change. As a thermostat, it had a good room temperature indication and sensitivity in activating the solenoid valve, but its function only with a program makes it a bad purchase for household use.