Very good choice, it heats the room very much. I use it occasionally so I can't evaluate the power consumption.

The 1000w heater in a 16 sqm low-ceiling room with significant heat loss (due to old windows) tested as the sole source of heating had the following results:
15.2 Initial room temperature.
16.9 After 1 hour.
17.3 After 2 hours.
17.5 After 3 hours.

The 1000w is small for my space, but I got it as a supplement and because it was the only thing that fit on the wall where I placed it. I believe the 1000w will do a good job for up to 10 sqm. For larger spaces, you should go for a bigger one, like a 2000 watt, or place two 1000 watt heaters in different spots in the room.
As a supplement to the air conditioner, it does an excellent job, even in my own square footage.

Edit: I got another 1000 watt heater for the opposite wall of the room. Now, when I turn both of them on, they do a great job and heat up the 16 sqm of the room very quickly.

I bought it for 144€ from a store that collaborates with Skroutz. It was used in a 12sqm children's room and it provides satisfactory warmth. The truth is, for the first 1-2 days, I didn't know how it works. I had to program the thermostat 3 degrees lower in order to have very satisfactory heating (the manual explains how to do it). It consumes around 6-6.5 kilowatts per hour at 26 degrees, so approximately 180 kilowatts per month just for the heater, without any cold or humidity. I estimate that it's okay for sleeping during cold nights.

I have now put it in all the rooms, fast, beautiful, I suppose reliable due to the brand (the previous ones I had for 2 years). For the money, I believe it is the best solution. It doesn't have WiFi, it doesn't have an easy menu, and it's not ceramic, but it's lit up due to its price. Ps. At first, it will emit a slight burnt smell, but it goes away.

I bought it to complement the air conditioning, thinking it was more economical than the accumulator I have. I was wrong. The three-phase panel I have cannot handle the operation of this and the 14-inch air conditioning unit I have in parallel! Its menu is very confusing and the instructions in the brochures it comes with are not sufficient at all. There are no instructions on YouTube like other devices have. Maybe it would be worth it for the bathroom due to its resistance to humidity, but in a smaller size

Quality, quiet, and economical. I bought it to have a stable temperature in the baby's room and it functions as a supplement to the radiator, until we turn on the heater it worked satisfactorily as a heating medium. If I need another one, I will definitely choose the same. The settings of its menu are indeed incomprehensible.

Very good construction and quickly warms up the children's room, which is almost 15 square meters. I put it for an hour at night before they go to sleep in eco mode, which is 18 degrees Celsius, and I also have great energy savings. The only downside is that wherever you place it, the user instructions for the menu, which is very difficult to use, will remain there

2 months and its job is to keep the room at 23 degrees when for any reason the radiator is not working until now it does this job is a little difficult programming it but it takes a little to read to understand the settings the ability to close it when the window opens is ultimately very good

It is very beautiful and shows a quality and reliable product.
I have no picture of consumption/burden on the electricity bill.
My only objection is the somewhat difficult menu, which, in combination with the lack of detailed instructions, makes it difficult to program.