We did the transatlantic cruise back to the states Oct 2022 in a Aqua-class room via the Edge. I can confirm the mirror does not fog and DOES get really warm. It worked well but at times it was a little much and contributed heat to our cabin when we had issues with the AC.
The AC in our cabin always seemed to struggle and we were religious about keeping the veranda shut and blinds closed. It was definitely not ideal and we almost complained about it. However, the bigger issue was the veranda window creaked and crackled the entire trip very loudly.
