I needed a small radiator for an unheated bathroom. (Approx 6m², no shower)
The requirements are not particularly high - it is next to the toilet and only needs to ensure that the toilet user at outside temperatures below 0 ° C the butt not freezes to the toilet seat. :-) This job he fulfilled well.
For heating in the usual room temperature, however, this device is too small with 500Watt - except perhaps in very tiny spaces.
I give only four stars because in my opinion the hysteresis between switching on and off is too large. Otherwise, everything is great!