In a 6 sq. m. bathroom - for the place it was purchased for - you can't stay dressed for more than 10 minutes. I don't know what it would do in a larger room, but in 6 sq. m. and on the low setting, it is a very honest choice. It was also tested for 15 minutes in a normal room in a house in the mountains with an indoor temperature of 12 degrees, and there I didn't notice any difference. Of course, I leave the oil radiator on all night to raise the temperature a bit to reach 18-19, so that's natural and expected. We are judging a very convenient, sturdy accessory, 500w with 2 intensity settings and a timer for turning off and on. We are not judging a 2000w heater or an air conditioner. From me, for the exact reason it was purchased, 5 stars.

P.S. If it also lasts over time, it's just what you need for small spaces.

Relatively good performance in a small space but sturdy construction. Unfortunately, after one year it burned out with minimal use

The product is downright unacceptable. I used it for 60 minutes with a thermometer in a 4-square meter bathroom and the temperature only increased by half a degree. From 19°C to 19.5°C.

I have it for 1 day. I gave it 4 stars mainly for the build quality and not for the performance. I measured it with a device and it consumes slightly more than 500W. It is a high-quality device, it doesn't make any noise, and it doesn't flicker. I tested it a) in a large, high-ceiling bathroom of about 12 square meters and I couldn't notice any difference. I also tested it in a small, low-ceiling WC-shower of 3 square meters and it raised the temperature from 15oC to 17oC in about 30 minutes. It's not meant to heat up the WC for taking a shower, but if you have a small space of 2-3 square meters without heating, it can help break the cold. I will test it more and come back with further feedback.